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New hot water cylinder question - hemp or ptfe/compound.....


 
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poolebybirth

from United Kingdom

Joined: 04 Jun 2008
Posts: 219
Location: Bedfordshire,
United Kingdom

PostPosted: Tue Aug 31, 2010 4:55 pm Reply with quote

FItting a new hot eater cylinder..... woudl you use hemp or ptfe tape and or jointing compound? I know hemp is against water regs though icon_sad.gif - how many turns of ptfe tape is going to be water tight? I usualyl use hawk white (normal not potable, so again against water regs) - anyoen used lsx as jointing compound? any good?
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kevplumb

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PostPosted: Tue Aug 31, 2010 5:00 pm Reply with quote

12 turns of tape monkeyhanger

i was born on the manor icon_lol.gif
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poolebybirth

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PostPosted: Tue Aug 31, 2010 5:01 pm Reply with quote

ok cheers kev - 12 turns and hawky white or lsx? i have heard lsx is very good????
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kevplumb

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PostPosted: Tue Aug 31, 2010 5:18 pm Reply with quote

12 turns and nix bonny lad icon_wink.gif
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poolebybirth (31 Aug 2010)
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poolebybirth

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PostPosted: Tue Aug 31, 2010 5:21 pm Reply with quote

cheers Kev you're a star icon_smile.gif

Got another little thing I'd like to ask your advice on mate..... toilet, siphon diaphragm replaced, all ok, but slight drip form wing nuts ..... doughnut letting by..... anything i can do to stop the drip? as can't get exact doughnut to fit icon_sad.gif
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kevplumb

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PostPosted: Tue Aug 31, 2010 5:40 pm Reply with quote

first tighten the big nut

a spot of sealer on the donut wont hurt

dry it and the surface first icon_wink.gif
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poolebybirth

from United Kingdom

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PostPosted: Tue Aug 31, 2010 5:48 pm Reply with quote

chers kev icon_smile.gif

tightened the siphon nut

what sealer on the doughnut? normal siliconer? or lsx?

dried both doughnut and pan where it sits icon_smile.gif
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kevplumb

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PostPosted: Tue Aug 31, 2010 6:26 pm Reply with quote

if your using silicone get some dow corning
lsx why not icon_wink.gif
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ChrisR

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PostPosted: Tue Aug 31, 2010 7:02 pm Reply with quote

Loctite 55 - string ptfe stuff, has won a lot of friends. It's MUCH less likely to leak if it's backed off, than tape.
It takes a little practice to know how much to put on but I love the stuff.
Don't be taken in by cheaper lookalikes which are more like narrow thick PTFE. I thnk Todays Tools do one of those - avoid!

It's also good for long screws (- that's a plumbing connection, not a 4 inch 12...)
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poolebybirth

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Joined: 04 Jun 2008
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Location: Bedfordshire,
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PostPosted: Tue Aug 31, 2010 7:17 pm Reply with quote

kev - what do you mean "dow corning"?!!!


chrisR - I have used loctite tape before worked ok - do you mean use it on te doughnut or on the wingnut? what do you mean when you say "backed off" - sorry fi I sound dumb today icon_smile.gif
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kevplumb

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PostPosted: Tue Aug 31, 2010 7:32 pm Reply with quote

dow corning trade name icon_wink.gif

when you go to the plumbcentre in oxford street ask for keith icon_wink.gif

if memory serves icon_biggrin.gif
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Threadjacker

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PostPosted: Tue Aug 31, 2010 8:00 pm Reply with quote

Dow Corning silicone is probably the best there is, its super smooth, fast curing and sticks like a son of a .......

http://www.screwfix.com/prods/58308/Sealants-Adhesives/Sealants/Sanitary-Sealants/Dow-Corning-785-white

Backed off means when you turn back a fitting, ever fitted an outside tap and it only tightens and the 1 'o clock position? back it off with PTFE and it will probably leak.
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kevplumb (31 Aug 2010)
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