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Ask The Trades › DIY Forum › Plumbing Questions › Bath mixer tap

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Bath mixer tap (Read 3679 times)

spongebob GDPR opt-out	Bath mixer tap Mar 24^th, 2005, 10:44pm Have been asked to fit a Bristan Prism bath mixer tap. Cold water is mains fed but hot is tank fed. Instructions with the tap say to fit a non-return valve into hot supply. Is this likely to restrict the flow by a significant amount?
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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Bath mixer tap Reply #1 - Mar 25^th, 2005, 10:32pm Possibly but its a water reg requirement Wouldn't have thought the briston would work without fitting a pressure reducing valve and matching the pressures
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spongebob GDPR opt-out Total Thanks: 147 For This Post: 0	Re: Bath mixer tap Reply #2 - Mar 26^th, 2005, 2:20pm Scruff....do you think that reducing the mains pressure may be the best option?
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CWatters Super Member Offline "Daddy fick it" says James Posts: 5150 Total Thanks: 58 For This Post: 0 Gender:	Re: Bath mixer tap Reply #3 - Mar 26^th, 2005, 4:37pm Confused here.. I thought non return valves were only fitted into the mains fed COLD supply to prevent stale hot water going back into the mains somehow. Why do the regs need a valve on the hot if it's tank fed?
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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Bath mixer tap Reply #4 - Mar 26^th, 2005, 9:20pm Fitting a pressure reducing valve would be the best way to go, but, you would still need the single check valves. Cwatters, check valve is required to stop the higher pressure (cold main) reversing up the hot, through the cylinder and flooding the loft.
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spongebob GDPR opt-out Total Thanks: 147 For This Post: 0	Re: Bath mixer tap Reply #5 - Mar 26^th, 2005, 10:55pm o.k. PRV's and single check valves. Any ideas as to best source for these items?
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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Bath mixer tap Reply #6 - Mar 27^th, 2005, 9:26am [quote author=spongebob link=1111704288/0#5 date=1111877747]o.k. PRV's and single check valves. Any ideas as to best source for these items? [/quote] Pipeline, Bss, PlumbCenter
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CWatters Super Member Offline "Daddy fick it" says James Posts: 5150 Total Thanks: 58 For This Post: 0 Gender:	Re: Bath mixer tap Reply #7 - Mar 27^th, 2005, 6:11pm [quote author=thescruff check valve is required to stop the higher pressure (cold main) reversing up the hot, through the cylinder and flooding the loft. [/quote] Thanks!
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