Frequently Asked Questions

Water Pressure

Are "tankless" water heaters recommended?


Often the outgoing water pressure from a "tankless" water heater is relatively low. As a result, these devices are not generally recommended for use with pressure balanced units due to the possible differences in water pressure from the hot and cold lines. For example, if you were to have 20 PSI on the hot supply line and 50 PSI on the cold, since pressure balancing adjusts to the low pressure, your resulting operating pressure in the shower will be reduced.

Can I change my standard tub, shower or tub/shower faucet to a pressure balance faucet?

Pressure balance faucets use different valve technology than non-pressure balance units. To obtain the benefits of pressure balance, you will need to purchase a new Delta® Monitor® pressure balance faucet.

More details and a demonstration of a pressure balance valve

Can I remove water restrictors in shower heads or aerators?

Flow restrictors are usually found in the neck or threaded end of the shower head exposed when the shower head is removed from the shower arm as shown in the image below.  They would appear in the opening of the aerator when it is removed from a lavatory or kitchen faucet.

While it is possible to remove flow restrictors from shower heads, we strongly advise against it for several reasons.  Flow restrictors for faucets are an integral part of most aerators and it is generally not possible or desirable to remove them.

Our H2Okinetic showering devices are specifically designed to operate most efficiently at the flow rate controlled by the flow restrictor.  Removing the flow restrictor from an H2Okinetic showering device will result in improper operation and a very uncomfortable experience.

For water conservation purposes, most plumbing codes require faucets and showering devices to not exceed a certain maximum flow rate. Removing the flow restrictors could cause these devices to no longer meet these codes.

If you are noticing decreased water pressure or a poor quality flow rate, you may have debris in your flow restrictor or the screen filter in your shower head or aerator.  Often this is easily remedied with a simple cleaning process.


To clean the shower head, first remove it from the shower arm by turning it counterclockwise.  Aerators are removed in the same way, turning counter clockwise.


trouble shoot pressure restrictor


Examine the threaded portion of the shower head or aerator and flush or rub away any debris you find clogging the flow restrictor or filter screen.  You may want to soak it in vinegar overnight to remove any lime deposits.  Once you do this, flush it well with water, rubbing it with a toothbrush if the deposits are stubborn.

Re-install the shower head or aerator by turning clockwise.

I just moved into a newly constructed home. Why would my water pressure be low?

During the first few days you use your faucets, a small amount of debris may be flushed out of your pipe system. This happens even though the plumber flushes the pipes before completing work on your home. In addition, particles of solder, copper chips, Plumber's tape and other installation materials can get caught in aerators and shower heads. Occasionally, a chip might damage the valve seat that provides the watertight seal. The tips below will help you avoid problems. These procedures are a good idea to follow each time the water has been turned off for repairs in your home.


TO FLUSH A KITCHEN OR LAVATORY FAUCET:

  1. Remove aerator and black sealing gasket above it


    trouble shoot pressure new home kit

  2. Turn faucet handle(s) to full on hot and cold mixed position(s) and flush lines for two minutes before turning off water with handle(s)

  3. Replace aerator

TO FLUSH A TUB / SHOWER FAUCET:

  1. Remove shower head if applicable


    trouble shoot pressure hew home tub

  2. Turn handle(s) to full on hot and cold mixed position(s)

  3. Flush spout two minutes without moving handle(s)

  4. If you have a shower head, divert water to it and flush for two minutes. BE SAFE! Make sure cold water flows FIRST and that the rotational handle limit stop is properly set. See information on setting the adjustable limit stop. Also, watch this how to video for instructions on setting the adjustable limit stop.

  5. Replace shower head

Some debris and/or foreign material in the lines may be too large to pass through the faucet whether it is a kitchen, lavatory or tub/shower faucet. To remove this type of debris:

  1. Turn off water supply to both hot and cold.

  2. Remove all internal components.

  3. Turn water supplies back on and let run for 30-60 seconds. (For kitchen and lavatory faucets turn a bucket or similar large container upside down over faucet to deflect the water into the sink.)

  4. Turn water supplies off again.

  5. Reassemble faucet.

  6. Turn water supplies back on.

You can also watch this video for information on how to flush the lines of your tub/shower.

If I have large differences between hot and cold pressure in my house, what effect does that have on operating pressure of a Monitor valve?

The Delta Faucet Monitor Series is equipped with a stainless steel pressure balancing spool. This pressure balancing unit protects the user by equalizing the water pressure inside of the shower valve itself. This protects the user if there is a decrease in pressure from the hot or the cold supply. If that were to occur the faucet will automatically readjust the water pressure from the opposite side so that it is equal with the supply that dropped in pressure. Meaning that if someone is in the shower and the toilet is flushed, the valve will reduce the hot water pressure coming into the faucet to match the cold. This ensures a scald free environment and a constant temperature within + or - 3 degrees Fahrenheit.

If you always have large differences between hot/cold water pressures, then the faucet will only allow the minimum amount of pressure through. If you have a hot water supply of 25 pounds per square inch and a cold water supply of 60 pounds per square inch then the faucet will always operate at 25 pounds per square inch.

Read more on how pressure balancing works.

Why does my faucet have low water pressure?

The flow restrictors required for aerators and shower heads can clog, resulting in greatly reduced flow rates. Remove the aerator or shower head and make sure the flow restrictor is not clogged. Additionally, flushing the system properly will help to reduce the possibility and frequency of occurrences. The tips below will help you avoid problems. These procedures are a good idea to follow each time the water has been turned off for repairs in your home.

The flow restrictors required for aerators and shower heads can clog, resulting in greatly reduced flow rates. Remove the aerator or shower head and make sure the flow restrictor is not clogged. Additionally, flushing the system properly will help to reduce the possibility and frequency of occurrences. The tips below will help you avoid problems. These procedures are a good idea to follow each time the water has been turned off for repairs in your home.


TO FLUSH A KITCHEN OR LAVATORY FAUCET:

  1. Remove aerator and black sealing gasket above it


    trouble shoot pressure low faucet kit

     

  2. Turn faucet handle(s) to full on hot and cold mixed position(s) and flush lines for two minutes before turning off water with handle(s)

  3. Replace aerator

 

TO FLUSH A TUB / SHOWER FAUCET:

  1. Remove showerhead if applicable


    trouble shoot pressure low tub kit

     

  2. Turn handle(s) to full on hot and cold mixed position(s)

  3. Flush spout two minutes without moving handle(s)

  4. If you have a showerhead, divert water to it and flush for two minutes. BE SAFE! Make sure cold water flows FIRST and that the rotational handle limit stop is properly set. See information on setting the adjustable limit stop. Also, watch this how to video for instructions on setting the adjustable limit stop.

  5. Replace showerhead

 

Some debris and/or foreign material in the lines may be too large to pass through the faucet whether it is a kitchen, lavatory or tub/shower faucet. To remove this type of debris:

  1. Turn off water supply to both hot and cold.

  2. Remove all internal components.

  3. Turn water supplies back on and let run for 30-60 seconds. (For kitchen and lavatory faucets turn a bucket or similar large container upside down over faucet to deflect the water into the sink.)

  4. Turn water supplies off again.

  5. Reassemble faucet.

  6. Turn water supplies back on.

You can also watch this video for information on how to flush the lines of your tub/shower.

Why does my new faucet have reduced flow? My old faucet had plenty of volume.


Please keep in mind that all new faucets since 1994 are restricted to conserve water per EPA code mandates. Older faucets had no restrictions. Beyond intentional flow restriction, new installations can sometimes have reduced flow if the lines are not flushed prior to installation of aerators or shower heads. The flow restrictors required for aerators and shower heads can clog, resulting in greatly reduced flow rates. Remove the aerator or shower head and make sure the flow restrictor is not clogged.

Customer Q & A

(21 Questions : 22 Answers)

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2 days ago
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wild bill
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Answer: 
Hi Wild Bill, Thank you for your question. Most likely, you are experiencing "shower-rise" where the water can’t get out of the spout as fast as it flows through the valve. This causes the water to back up and come out the shower head. There can be one of several reasons for this:
The valve could be upside down
The length from the valve to the tub spout is outside of the 8" to 18" rule
There is more than one 90-degree angle
Something other than copper or galvanized pipe was used going to the spout
The most common reason is that there is something restricting the water flow to the spout, e.g. solder or something lodged in the pipe. Something is impeding the flow of water to the spout and causing it to back up and go out the shower head. If this is the cause of shower-rise it is possible to remove the blockage by removing the tub spout; then, feeding a plumber’s snake or a speedometer cable up through the tub drop. The act of feeding it causes it to twirl and loosen the blockage. Be sure to flush the valve before reinstalling the tub spout. Be sure to check the tub spout itself for blockage.
If none of these help, you may need to call a plumber. After the shower has been installed and the wall has been closed, there is little that can be done to remedy this situation yourself.
A pressure to prevent this is not measured, however our tub/showers will function correctly up to 100 psi.
Thanks,
Dave
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1 day ago
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can i increase flow rate on a 2300 series valve

Topics: Care/Maintenance
Age: 65 or over
Gender: Male
Project Type: New
Ownership: 10+ years
Skill Level: Intermediate
6 days ago
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brad
Hemphill, TX 75948, USA
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Answer: 
Hi Brad, Thank you for your question. Unfortunately there is no specific way to increase the flow rate of the 2300 series faucet. Make sure your showerhead and the cartridges are free from debris and not restricted in any way.
Thanks,
Dave
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4 days ago
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I am needing to replace a shower only and a shower/tub faucet. I think I would like 2.5 GPM on both to ensure good water flow. Please recommend the faucet with the best flow.
Thanks!
3 weeks, 6 days ago
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Maureen
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Answer: 
Hi Maureen, Thank you for your question. All of the shower only and tub/shower valves have outputs higher than 2.5 gpm assuming you have household water pressure above 40psi. The showerhead itself is what limits the water flow to a max of 2.5 gpm. Our T17T thermostatic trims offer the highest flow rate followed by the T13/14 series trims and finally the T17 series.
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Dave
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3 weeks, 4 days ago
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Best model shower assembly to get high flow?

I currently have a Delta Multichoice 13 series shower/tub with marginal flow. I put in a new RP46074 cartridge which didn't change anything. All the other fixtures in my house have great water pressure and flow. When I turn on the water with just the rough in installed and no cartridge in place the water comes flying out, so I don't think the issue is the plumbing coming to the fixture.

I'm thinking to get a higher flow rate out of my shower I might need to change to a 1700 series to get a dual function cartridge. Does this make sense? And would I get more flow from a thermostatic valve or a pressure balanced valve? I'd appreciate any thoughts before I spend $400 for an experiment that might not work. Thanks!--Matt
Age: 35 to 44
Gender: Male
Project Type: Replacement
Ownership: < 1 year
Skill Level: Intermediate
2 months ago
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Matt
Utah
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Answer: 
Hi Matt, Thank you for your question. Our T17T series trims with a dual function thermostatic cartridge offer the highest flow rate out of the valve, approximately 1.5 gallons more per minute than your current shower. One thing you will want to check first is the flow rate out of the shower arm without the showerhead. Depending on the specific model of your faucet the showerheads have a max flow rate of any where from 1.5 to 2.5 gpm which is what lowers the flow rate.
Thaks,
Dave
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2 months ago
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Low water pressure?

I have a new construction home and purchased the T17251-RB shower trim kit from Lowes. The shower head that came with the kit is a large square with several nozzles that fill in the square. Is it possible that the water pressure is low because of the increased number of nozzles in the head? How can I increase the water pressure in these units? It is so low that it just trickles out. These units were just purchased at the end of June of 2014. The Delta model number is: RP62283RB. I looked up other Delta shower head models and they all have the same 80 psi. If I were to get a different shower head would I experience the same pressure or more pressure with less nozzles since the psi is the same? This was not the shower head I initially wanted, but it is what was sent with the Lowes Model number: T17251-RB.

Please advise. Thank you.
Topics: Performance
4 months, 3 weeks ago
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Jennifer
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Answer: 
Hi Jennifer, Thank you for your question. The psi rating with regards to the showerhead shows at what psi the showerhead flows at its maximum flow rate. Which on the model RP62283RB is 2.5 gallons per minute at 80 psi. The pressure coming out of the head is based mainly on your incoming household water pressure which is normally between 30-70 psi.
A showerhead with less nozzles at the same gpm rate should increase the pressure feel as the water is being forced through less opeings.
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Dave
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4 months, 3 weeks ago
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application to avoid having 4 installation holes. Is the PSI filling pressure greatly different from kitchen to bath tub faucets? If we use a kitchen faucet, will it take "forever" to fill? Thank you
Topics: Performance
6 months ago
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Mrs. K
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Answer: 
Hi Mrs. K, Thank you for your question. We would not recommend using a kitchen faucet to fill a whirlpool bathtub. The Cassidy kitchen faucet has a flow rate of 1.8 gallons per minute at 60 psi. In comparison the Cassidy roman tub faucet features a flow rate of 18 gallons per minute at 60 psi. On a 50 gallon tub, the roman tub faucet would fill it in under 3 minutes compared to over 25 minutes with the kitchen faucet.
Thanks,
Dave
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6 months ago
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Just installed a brand new Delta Foundations (21988LF ) kitchen faucet and the flow on the hot side is abysmal. It is so low that aerator seems to have no effect.

I am getting much higher flow rate on the cold side (right at 1.8 gpm) Cold water aerates nicely.

I wash most dishes by hand, so the low hot flow is a real bummer.

What can I do to improve the hot water flow?
Topics: Performance
Age: 55 to 64
Gender: Female
Project Type: Replacement
Ownership: < 1 year
Skill Level: Intermediate
8 months ago
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Laura H
Athens, GA, USA
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Answer: 
Hi Laura, We are sorry that you are experiencing a problem with your faucet. It sounds like there may be some debris blocking the hot water supply. Check your hot water flow at the hot water shut off/stop and at the top of the supply line that leads to the faucet. If you have good pressure at those 2 points then you will want to flush the faucet. I have attached a link below for a How to flush the lines on your kitchen faucet video. This will walk you through the steps on flushing the lines on both 1 and 2 handle faucet models.
Thanks,
Dave
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8 months ago
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Hot water from shower head, but only lukewarm from tub faucet!?!?!?

I have a Delta Monitor 1400 purchased in 2007. Recently when using the shower, we get hot water perfectly from then shower head. However from the tubs faucet we can only get lukewarm water. I replaced the cartridge yesterday, and still having the same problem. Also since replacing the cartridge there is now a slow leak from the faucet which slowly stops after about an hour.
Topics: Purchase, Warranty, Performance, Care/Maintenance
Age: 25 to 34
Gender: Male
Skill Level: Intermediate
9 months ago
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Rick
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Answer: 
Hi Rick, We are sorry that you are experiencing a problem with your faucet. There may be some debris in the lines or valve body causing the issue. We recommend that you flush the faucet. I have attached a link to a How to flush the lines on your Delta tub/shower video. Make sure you inspect the valve body for mineral build up or corrosion as this may prevent the cartridge from seating properly.
Thanks,
Dave

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8 months ago
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How do i take apart a delta monitor to restore flow

Topics: Care/Maintenance
Age: 55 to 64
Gender: Male
Project Type: New
Ownership: 6-10 years
Skill Level: Intermediate
9 months ago
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David
Ct
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Answer: 
Hi David, Thank you for your question. In most cases you will remove the handle, trim sleeve, and bonnet nut to expose the cartridge. I have attached a link below for a how to video on how to change the cartridges on the various Delta models. This video will walk you through the disassembly/assembly process step by step.
Thanks,
Dave

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9 months ago
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Would the shower valve cause less pressure.

Shower part number is 174902-RB
Topics: Care/Maintenance
11 months ago
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Den
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Answer: 
Hi Den, Thank you for your question. The shower valve should not cause less pressure. There may be some type of debris in the faucet or lines causing a drop in pressure. I have attached a link below for the How to video for flushing the lines of your faucet.
Thanks,
Dave

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11 months ago
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