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Helpful ReplyHow to lag an external pipe?

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rightyho
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2010/12/21 10:01:59 (permalink)

How to lag an external pipe?

I have a pipe that carries washing machine waste briefly outside the house (1.5m) before going back inside again.
Fcuk knows why it's plumbed like this - it would have fitted, with some work, behind the kitchen cabinets.

Anyway, it's frozen solid on account of not having enough of an angle on it to drain quickly.

Hence, I can't use the washing machine.

I took it off, thawed it, refitted it, lagged it with the standard foam stuff from B&Q etc, then further insulated it by using some water tank jackets which were redundant after changing the heating to a combi boiler.

It's now frozen solid again.

I'm thinking I need to either put a large circumference sleeve pipe (full bore drain pipe) around it and pack it with fibreglass, or box it in to the wall using whatever waterproof materials come to hand, and then insulate with fibreglass.

How do builders/plumbers usually deal with this?

Thanks.
#1
kitty
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Re:How to lag an external pipe? 2010/12/21 10:09:46 (permalink) ☄ Helpful
I have an outside tap which used to freeze over to the point that one year it burst. I've got a box built around it and that squirty-polystyrene like stuff (expandable foam?) filled into the box. Never had a problem since.

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#2
rightyho
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Re:How to lag an external pipe? 2010/12/21 10:12:02 (permalink)
Thanks Kitty.
I'm thinking to build a wooden box around it, waterproof it somehow, then use fibreglass or expanding foam from a can.

Pain in the ar5e this.
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peagreen
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Re:How to lag an external pipe? 2010/12/21 10:24:11 (permalink)
If there is enough room righty, could you not actually redirect them behind the kitchen cabinets thus stopping them freezing?  Plus you could do away with the excess pipework outside?  Just a thought, might be hassle?

“Anyone who makes up their mind about an issue before they hear the issue is a fool.”
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13.3kg increase in 5 months.....

#4
rightyho
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Re:How to lag an external pipe? 2010/12/21 10:33:19 (permalink)
The blo0dy combi is plumbed into it all.

Rerouting all of it will be a lot more hassle than lagging.
#5
BBC
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Re:How to lag an external pipe? 2010/12/21 10:41:57 (permalink)
As a temporary fix until you sort the pipe will the waste pipe stretch to the sink?
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rightyho
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Re:How to lag an external pipe? 2010/12/21 10:44:18 (permalink)
No mate.

I'm going to temporarily fix it by disconnecting it completely and letting the washing machine chuck it all straight out the wall. It should flow naturally to the drain cover about a foot away anyway.
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peagreen
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Re:How to lag an external pipe? 2010/12/21 10:44:25 (permalink)
^^^  BBC has the idea you, can get an extension hose that may reach to the sink and hook over - good idea BBC

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#8
essex_chris
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Re:How to lag an external pipe? 2010/12/21 11:44:51 (permalink)
Is this a euphamism?

I hope not

Awesome pic, but Tony you're not doing yourself many favours posting up tips on preventing the gag reflex and then a picture of a guy touching his toes - Ak
#9
klein
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Re:How to lag an external pipe? 2010/12/21 11:48:21 (permalink)
this, coupled with regul;ar insulation may be your friend:
http://www.tlc-direct.co....x/Heat_Tape/index.html

#10
severen
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Re:How to lag an external pipe? 2010/12/21 12:47:35 (permalink)
showing my ignorance maybe, but would wrapping tinfoil around before/after the normal laggy stuff not be useful?
#11
stokie
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Re:How to lag an external pipe? 2010/12/21 13:18:18 (permalink)
armaflex external pipe lagging, works well on condense
#12
rightyho
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Re:How to lag an external pipe? 2010/12/21 15:05:12 (permalink)
stokie

armaflex external pipe lagging, works well on condense


Good shout.
Will order.
Thanks mate.
#13
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