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.

  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.

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.

  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.

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

(32 Questions : 33 Answers)

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Model # 134900

I recently installed the above shower system but the water pressure is extemely high. Is there a part I can install to reduce water pressure? Thank you
Topics: Performance
Project Type: New
Ownership: < 1 year
2 weeks, 1 day ago
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Anthony
NYC
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Answer: 
Thank you for your question. Delta Faucet model # 134900 does not have a way to regulate the volume of water coming out of the showerhead. To do that, you will need to upgrade to the 1700 series trim where there is a separate knob for temperature and one for volume.
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Kitchen faucet Hot pressure is low on new installation. cold fine.

Aerator OK, pressure on hot line to sink ok, Using left setting of HOT or Cold with no mixing.
Kate. 16970-sssd-dst. Ready to remove and buy other brand. Help.
Topics: Performance
Skill Level: Intermediate
1 month ago
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Tony
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Answer: 
Thank you for your question. I apologize that you are having an issue with your faucet. To ensure that you receive the correct part, please contact our Home Owner/Warranty line at 800-345-3358.
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Temperature issues with Delta Monitor Series 1500

I have a passive hot water loop installed in my home. The shower (located on the second floor) is the most distant fixture from the water heater (located in the basement). My shower fixture is a Delta Monitor Series 1500.

When I am taking a shower I need to constantly adjust the temperature control to a warmer setting in order to keep the temperature constant. If I open the hot water tap slightly in the bathroom sink, the shower water temperature increases immediately and dramatically. I have already ordered RP29405 which will convert the fixture to a series 1700.

Any suggestions?
Topics: Performance, Care/Maintenance
Age: 65 or over
Gender: Male
Project Type: Replacement
Ownership: 6-10 years
Skill Level: Intermediate
1 month, 2 weeks ago
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Terry
Kansas
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Answer: 
Thank you for your questions. Without knowing all the details of your setup, it is difficult to give you the correct advice. Based on what you have said, we think you may have a tankless water heater. If this is the case, we would recommend turning down the temperature of the water heater just a little bit.

The reason we suggest this is because at a lower temperature, it will kick on more often and produce more hot water for your shower when you need it.
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1 month, 1 week ago
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The cold water flow seems to be low also but not like the trickle I get from the hot side. The flow doesn't change when the shower plunger is pulled either.

I checked the flow of my system by removing the valve cartridge, turning the water back on and giving my new tile and tub a nice dousing.

Any helpful advise would be greatly appreciated.
Topics: Performance
Age: 35 to 44
Gender: Male
Project Type: New
Ownership: < 1 year
Skill Level: Intermediate
2 months ago
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Jason
Michigan
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Answer: 
Thank you for your question. I apologize for the issue that you are experiencing. To ensure the proper part is identified for repair, please contact our toll-free Home Owner/Warranty department at 800-345-3358.
Skill Level: Advanced
1 month, 4 weeks ago
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High flow shower valve

My customer wants to install a high flow shower valve equal to his r2707 RomanTub Valve ?
I explained that this is not code - he has 1/2" supply only - I am just looking for a professional way to explain why he cannot do this ?
Topics: Performance
Age: 45 to 54
Gender: Female
Project Type: New
2 months, 2 weeks ago
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Sue
Bloomington, IL, USA
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Answer: 
Thank you for your question. Delta Faucet model # R2707 flows at 18 gpm at 80 psi. We do manufacture shower rough in valves that when paired with our 17T trims will flow at 9 gpm at 80 psi. That is the highest flow rate we offer for a shower only combination. You will need to order Delta Faucet model # R10000-UNBXHF with a 17T series trim to get this flow.
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2 months, 1 week ago
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Indianapolis, IN, USA
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New Cicero kitchen faucet - very low pressure on hot water

I just installed a new Cicero faucet yesterday; it works great when on cold water, but when I turn on the hot water, the water pressure is incredibly low. I've seen this as a question a number of times on this site and have yet to see an answer other than "call this 800 number."

Please advise what the problem is or if I should return this brand new faucet for a refund.
Topics: Performance
Age: 25 to 34
Gender: Male
Project Type: Replacement
Ownership: < 1 year
Skill Level: Intermediate
3 months, 3 weeks ago
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TIm
NY
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Answer: 
Thank you for your question. I apologize for the issue that you are experiencing. It is possible that you will need a new cartridge assembly. The water pressure should not be different when the temperature is changed. To ensure the proper part is identified for repair, please contact our toll-free Home Owner/Warranty department at 800-345-3358.
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3 months, 3 weeks ago
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Indianapolis, IN, USA
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Delta single valve bathe shower faucet

I noticed the other day in my shower room that I could here water through the shower faucet even though the shower faucet was turned off.There was no water leaking from the bath faucet or shower.I decided to change out the faucet cartridge as maybe the valve was leaking from hot to cold.After doing this there was no change I could still here the water through the faucet.
Does this mean that the seals between the hot and cold on the hardward of the valve body are shot .This bathroom is hardly ever used.Do I need to replace the whole valve.
Topics: Care/Maintenance
Age: 55 to 64
Project Type: Replacement
Ownership: 2-5 years
Skill Level: Intermediate
4 months, 1 week ago
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Keith
Cibolo, TX, USA
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Answer: 
Thank you for your question and I apologize that you are having an issue. You might be getting cross-flow between your hot and cold lines. We suggest checking this by turning on the cold in your lavatory sink. If you do have cross flow, then it will come out hot water first and then turn cold.

If this is not them problem, then please contact our Home Owner/Warranty line at 800-345-3358 for further investigation.
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4 months ago
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Indianapolis, IN, USA
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In2ition shower head won't get hot

We recently had a in2ition shower head installed and it worked fine for a month or two. Now the water only gets moderately warm but not nearly hot enough and the pressure is lower. I have cleaned the filter and checked the temperature restrictor but it didn't help any. I insulated my water lines in my basement to make sure I wasn't losing heat from the heater to the shower but no change. The hot water works fine everywhere else. I turned the cold water supply off and got hot water to come out but that was the only way. It seems like it may be related to the feature that prevents scalding? Not sure but don't know what else to do.
Topics: Warranty, Performance
Age: 25 to 34
Gender: Male
Project Type: Replacement
Ownership: < 1 year
Skill Level: Advanced
4 months, 2 weeks ago
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Mike
Michigan, USA
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Answer: 
Thank you for your question. I apologize for the issue that you are experiencing. To ensure the proper part is identified for repair, please contact our toll-free Home Owner/Warranty department at 800-345-3358.
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4 months, 2 weeks ago
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How to fix low hot water pressure in Delta 400-DST kitchen faucet?

I recently disconnected and reconnected the hot water supply tube at the shutoff valve, and now the hot water pressure at the faucet is very low. The cold water pressure is fine. The pressure at the hot water valve seems fine as well. I thought I would replace the hot water supply hose, but they're all integrated like an octopus! Which parts do I need to fix this problem?
Topics: Care/Maintenance
4 months, 3 weeks ago
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Mel
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Answer: 
Thank you for your question. I apologize for the issue that you are experiencing. To ensure the proper part is identified for repair, please contact our toll-free Home Owner/Warranty department at 800-345-3358.
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4 months, 3 weeks ago
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Water flow suddenly decreased by about half.

While running the bath water about 10 days ago, the water flow/pressure suddenly cut in half after the water was running normally for the first 10 seconds. The pressure is like that for both the faucet and shower and pressure is completely normal everywhere else including the bathroom sink. Pressure remains constant when I play with the temperature. Model 1748-74.
Topics: Warranty, Performance
Age: 35 to 44
Gender: Male
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Ownership: 2-5 years
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4 months, 3 weeks ago
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Answer: 
Thank you for your question. I apologize for the issue that you are experiencing. To ensure the proper part is identified for repair, please contact our toll-free Home Owner/Warranty department at 800-345-3358.
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4 months, 3 weeks ago
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Product Q&A

32 Questions | 33 Answers