compression fittings....

[dynomo]

i was uncertain about something...

I have a brand new 2 bedroom property which has a high pressure water system (tank in loft + hot water cylinder), i.e. the mains water supply coming indoors is underneath the kitchen sink via 22mm pipes and not the standard 15mm. When measuring the pressure value on the outside tap, i obtained a value of 4 bar.

My question is, if i needed to alter any plumbing work underneath the sink, eg. to install a water softener, could I use compression fittings as a replacement for solder ring fittings? I know with some pressurised heating systems, compression joints are deemed unsuitable.

If compression joints are considered less practical, what about plastic or copper push fit fittings to replace soldered?

 

[gas4you]

I would class 22mm water pipe as standard not 15mm.

If you have a tank in the loft are you sure you have a mains un-vented cylinder or do you mean a f&e tank for the heating?

Yes compression fittings will be ok but unsightly.

 

[dynomo]

If you have a tank in the loft are you sure you have a mains un-vented cylinder or do you mean a f&e tank for the heating?

sorry buddy, all i know is that i have a cylinder in one of the storing cupboards ill have to get someone to have a proper look for me.

to be honest, the property is new, but the pipe work is messy! soldered joints are dirty, half of the pipes have already turned green! from what i have seen, compression joints look far neater..

 

[HarrogateGas]

I would class 22mm water pipe as standard not 15mm.

If you have a tank in the loft are you sure you have a mains un-vented cylinder or do you mean a f&e tank for the heating?

Yes compression fittings will be ok but unsightly.

I would call 15mm a standard internal mains water pipe, a lot of new builds use 10mm for hot and cold.

I wouldnt call compression fitting under a sink which is closed off by a cupboard and out of sight due to varoius cleaning products and washing powers unsightly either.......in fact for a diy i call it common sense.

 

[gas4you]

I would call 15mm a standard internal mains water pipe, a lot of new builds use 10mm for hot and cold.

Were talking main supply from stop cock here I think

 

[dynomo]

prior to stop cock = 22mm, pipework continues at 22mm after stopcock and then splits to 15mm feeding the garden tap first.

 

[HarrogateGas]

I would call 15mm a standard internal mains water pipe, a lot of new builds use 10mm for hot and cold.

Were talking main supply from stop cock here I think

So am I...............

 

[ChrisR]

I know with some pressurised heating systems, compression joints are deemed unsuitable.

Not true for water. To me comp fittings under a sink are 100% sensible. Much easier to alter than solder if you change a tap or need an extra washing machine valve etc.

 

[dynomo]

cheers Chris
Was waiting for someone to nail it.