Frequently Asked Questions

Water Filtration

Can I connect the Simply PUR spout to another under sink filtration system?

No. The Simply PUR water filtration system was designed only to operate as a complete system and will not function if connected to another filtration unit. If you have a whole house filter or water softener in your home, this will not affect the installation of Simply PUR.

Can Simply PUR water filtration system be connected to an existing faucet installation?

Yes, if there is an available hole in the sink or counter top to place the Simply PUR water filtration system. If there is not an available hole you may consider removing an accessory such as a soap/lotion dispenser, drilling an additional hole in solid surfaces, or replacing the faucet or sink with one that has a hole to accommodate Simply PUR.

Can you run hot water through the Simply PUR water filtration system?

No. Simply PUR should be connected to the cold water supply only. Connecting to hot water will decrease the effectiveness of the filter.

Do you have any troubleshooting tips for Simply PUR?

Note: See the diagram below for reference numbers in these tips.
upper housing leak trouble shoot
If leak appears in upper housing (3) but not at hose connections:
Remove filter unit and call 1-800-345-DELTA.


1. If filter unit leaks:
A. Check hose connections-retighten if necessary.
B. Check lower housing gasket (1) - RP42343 & upper housing quad-ring (2) - RP42670 for proper installation and/or damage. Replace if necessary.

2. If light indicator doesn’t work:
A. Check batteries (4) and proper installation. See above for battery replacement.
B. Check lightpipe (5) for proper installation and/or damage. If damaged call 1-800-345-DELTA.

3. If faucet leaks from spout outlet:
A. SHUT OFF WATER SUPPLIES. Replace seat and spring (6) - RP4993 or
B. SHUT OFF WATER SUPPLIES. Replace stem unit (7) - RP1740.
C. Activate the vent feature (refer to page 9 step B in the owners manual).

4. If faucet exhibits low water flow:
Replace the filter cartridge (8). Remember, the
condition of your water may cause the filter
cartridge to fill before the filter monitor indicates the cartridge is full. This is normal and indicates that the filter is working.

Note: If you cannot resolve the problem call 1-800-345-DELTA

Does the Simply PUR water filtration system reduce fluoride?

The PUR filters used in the Simply PUR water filtration system leave the beneficial fluoride in your drinking water, which may already be present.

Does the Simply PUR water filtration system remove MTBE (Methyl Tertiary Butyl Ether)?

The PUR filters used in the Simply PUR water filtration system have received NSF (a nationally recognized, not for profit agency for the certification of water filters) certification for the reduction of MTBE, along with 30 other contaminants including lead.

How do you replace the batteries?

Battery life is approximately one year. Two AA batteries are required to operate the light indicator. The light indicator will flash amber/red when the batteries need replaced.

replace batteries trouble shoot

A. Remove the battery holder (1) from the top of the filter head (2).

B. Replace the old batteries with 2 new AA batteries.

C. Reinsert the battery holder into the top of the filter head. Make sure battery holder is pushed in all the way for full engagement. When battery holder is connected, the indicator light will flash red-green for 10 seconds.

How do you replace the filter?

Use only PUR brand blue faucet mount filters - PUR filter cartridge #RF-4050 L or RF-9999 (same filters used in PUR faucet mount system). Replacement filters are available at most major retail stores, including: home improvement stores, discount stores, drug stores, hardware stores and grocery stores. The filter life is up to 100 gallons or approximately 3 months.

NOTE: You cannot clean a filter cartridge. Do not remove the filter unless you intend to replace it, the system will not operate without one. Removing a filter resets the system.

replace filter trouble shoot

A. The system cannot be in operation when changing the filter. Make sure the handle (1) is in the off (down) position. You DO NOT need to shut off the water supply lines.

B. Press air release valve (1) prior to unscrewing the filter shuttle/housing (2). Note: You can use the wrench (3) supplied with the unit to help loosen the housing. If you encounter difficulty unthreading the filter housing, remove unit from wall mount bracket to replace filter cartridge. WARNING: Be sure to remove the light pipe (4) before removing the filter unit (see page 6 of the owners manual).

C. Bring the shuttle to the kitchen sink; remove the old filter and any water in the shuttle.

D. Insert a new PUR filter. Make sure the filter and shuttle are properly aligned.

E. Reattach the filter shuttle to the system by screwing into place. Do not over tighten.

F. Press air release valve (Refer to page 9 step B of the owners manual). Run the water for 5 minutes to flush the filter cartridge. Then before each use, run water for 5 seconds to reactivate the filter.

How easy/difficult is it to install Simply PUR?


The Simply PUR system is relatively simple to install -- no more difficult than a faucet installation. All hoses, connectors and mounting hardware are included in the box. Below is a brief summary of the installation process. See the Owners Manual for complete details.
  1. Mount the filter spout to the sink/counter top. This takes one mounting nut.

  2. Mount the below the sink filtration system to the cabinet wall in a location that is easy to access for replacing filters (typically just inside the cabinet door). This is the most difficult part of the installation and requires 2 screws to be installed in the cabinet wall to support the mounting bracket. Install the filter and batteries (included) into the filter system.

  3. Make hose connections. Most connections use Quick Connect® or other fittings that do not require tools.

  4. Connect the system to the cold water supply. A brass "T" is provided to allow the faucet and filter system to both be connected to the cold water. This hose connection requires a wrench.

  5. Test and flush the system and it is ready for use.

How long do the batteries in the Simply PUR water filtration system last?

Simply PUR uses 2 AA batteries that should last approximately one year. The light indicator will flash amber/red when the batteries need replaced.

How long do the filters last?


The filters last up to 100 gallons or approximately 3 months. The color of the light indicator shows the status of the filter life:

  • Green – new filter, normal operation
  • Amber – nearing the end of filter life
  • Red – end of filter life, replace filter

What are the Simply PUR water filtration system filters made of?

The PUR 3-stage filter includes: 

  • Stage 1: CLEANS via trapping sediment in a poly spun fiber sediment wrap
  • Stage 2: HEALTHY via a powdered activated coconut carbon and a heavy metal adsorbent (Aluminum silicate - Alusil),
  • Stage 3: TASTE ENHANCEMENT via loose-filled natural Coral Calcium in the central core of the filter

What do the Simply PUR water filtration system light indicators mean?

The indicator lights show the following:

  • Green – normal operation

  • Amber – approaching end of filter life

  • Red – replace filter

  • Flashing Amber/Red – replace batteries

  • Flashing Green – low or high water flow – system operational

Where can I find PUR replacement filters?

PUR filters are available at most major retail stores, including home improvement stores, discount stores, drug stores, hardware stores and grocery stores. Simply PUR water filtration system uses PUR blue faucet mount replacement filters found anywhere PUR products are sold ? RF-4050 L or RF-9999.

Where is the filter installed in the Simply PUR water filtration system?

The filter is located in a small housing unit mounted below the sink. The system includes a flexible mounting system to allow for placement anywhere inside the sink cabinet. Filters are easy to change with a turn of the filter’s lower housing unit.

Why am I not getting water from my Simply PUR water filtration system?

The filter needs to be replaced. Simply PUR will automatically shut-off at the end of the filter life if there is continued use of the filter after the light turns red. The filter should be replaced when the light indicator is red.

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  • 2016-02-11 T10:21:15.556-06:00
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  • co_noquestions
  • loc_en_US, sid_faq_water-filtration, prod, sort_default