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Honeywell Home D04FM Pressure Reducing Valve 1.5-6… (4671J)

£ 41.69INC VAT

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Honeywell Home D04FM Pressure Reducing Valve 1.5-6 22mm x 22mm (4671J)

Designed to protect household appliances against excessive supply pressures. Can reduce water consumption and damage from over-pressurisation. Constant outlet pressure is maintained despite fluctuating inlet pressure. Supplied with pressure gauge.

  • Plastic & Brass
  • 16bar Inlet Pressure
  • Simple Compact Construction
  • Spring-Loaded & Lightweight

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View all: Honeywell Home Pressure Reducing Valves

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Rated 2 out of 5 by from Bore size of 12 mm The minimum internal bore size is around 12 mm. I'm not impressed by this given that it's intended to be used with 22 mm pipe! Although to be fair it's a lot larger than a 15/22 mm PRV I bought elsewhere (Rob Pond PRV1522) which reduced down to about 4 mm if you can believe it! You'll want to take this into consideration as it will restrict the flow. I'm surprised that no one else has pegged this..
Date published: 2022-08-23
Rated 4 out of 5 by from Honeywell pressure red valve Excellent part, has gauge too, very useful and better price than others
Date published: 2021-02-19
Rated 3 out of 5 by from Not great and not Honeywell Wanted a quality item so paid more for Honeywell but it is another brand on box - no mention of Honeywell. Plastic pressure gauge and spindle. Minimal instructions - unclear whether for use as a dynamic or static pressure regulation - big difference !. Needed to fit it but would avoid. Poor quality. Not happy.
Date published: 2021-02-03
Rated 5 out of 5 by from Works Fine I had an irritating thud through the pipework in my house when the washing machine was drawing cold water. After some research I decided to fit a PRV rather than a water hammer arrestor. I fitted it in around 10 minutes & reduced the mains pressure from around 6 bar to 3. Some of the previous reviews comment on the fact that the thread on the gauge is plastic & not brass (as shown in the image) and they were having issues with this not sealing onto the PRV. I applied a goodly amount of PTFE tape & have had no issues. I think you have the option to use the gauge to set the desired pressure & then remove the gauge & fit a blanking plug (supplied). I have left mine on for now to monitor it but may consider removing the gauge later. I cannot comment on reliability, as it has only been fitted a few hours, but it has got rid of the annoying thudding noise!
Date published: 2021-02-02
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What is the mininum bore size?

The minimum internal bore size should be included in the specs table as it's a critical parameter.
Asked by: critor

I cannot remove the spring bonnet with an adjustable. Is there a special tool for loosening the bonnet? Also, am I correct in saying that it loosens by turning it clockwise?

Asked by: JohnnyDIY007
You need to grip the hole nut shape with either a ring spanner or water pump pliers.
Answered by: puddylove
Date published: 2021-10-26

Is it possible to turn the pressure gauge through 180 degrees

Asked by: Casey23
Yes, it is possible to turn the pressure gauge through 180 degrees for the Honeywell D04FS Pressure reducing valve.
Answered by: Honeywell Home Consumer Support
Date published: 2021-01-21

Can the PRV be fitted to 22mm plastic pipes, assuming I use suitable pipe inserts?

I'm intending to fit this under the bath just prior to a thermostatic mixer. The shower runs hot enough but bath is overwhelmed by cold supply pressure even after fitting a check valve to the hot inlet.
Asked by: 4eyesarebetterthantwo
Yes, PRV can be fitted to 22mm plastic pipes in case you are using suitable pipe inserts. If the one installed is the compression fitting pressure reducing valve, then the attachment to the plastic pipe depends on what the guidance is from the manufacturer of the plastic pipe.
Answered by: Honeywell Home Consumer Support
Date published: 2020-05-14

Is it essential the outlet pressure is set to be minimum if 1 bar below inlet pressure? I have a water softener I want to protect in the unlikely event water pressure goes high. Inlet pressure is 4 bar, can I set outlet pressure to also be 4 bar?

Asked by: Andy213
The D04 is suitable for reducing the pressure from 5.2 bar to 3.0 bar.
Answered by: Honeywell Home Consumer Support
Date published: 2020-10-26
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Specification
A Size 22 mm
Brand Honeywell Home
B Size 22 mm
CE Standard (Tested to EN...) EN 1567.
Construction Material (Plumbing) Plastic & Brass
Manufacturer Guarantee 1 Year Guarantee
Operating Water Pressure 1.5-6 bar
Pack Size 1
Pieces in Pack/Case 1
Product Diameter 22 mm
Product Type D04FM Pressure Reducing Valve
Temperature Range 0-70 °C

Product contents

22mm valve, compression nut and olives and pressure gauge.

Downloads

Instruction Manual