D2 from 15l under sink heater.

[Ben-gee]

I have a 10m run to get to outside, can this be done in 32mm polypropylene pushfit pipe?

 

[Robooo]

Polypropylene doesn't like hot water I guess. I might be wrong. Sorry can't delete it 🙂

 

[Robooo]

This is what I found:
A suitable plastic pipe (such as polypropylene complying with BS EN 1451-1) supported at maximum 300mm intervals, may be used for downstream pipe D2. A maximum distance between clips of 300mm provides adequate support to the pipe D2 in the event of discharge from safety devices

 

[Ben-gee]

I’m interested in the situation where I terminate outside at ground level, I’m not going into a stack.

 

[Robooo]

If it goes outside you need to take it into a gully or have a cage to protect others. Make sure the pipe facing downwards, use a shoe if you can.

 

[Robooo]

Plastic Coated Overflow Discharge Terminal Guard Boiler Relief Outlet Cover Cage | eBay

Find many great new & used options and get the best deals for Plastic Coated Overflow Discharge Terminal Guard Boiler Relief Outlet Cover Cage at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

 

[ShaunCorbs]

Yes polyprop is fine

 

[Ben-gee]

Cheers Shaun- would be soooo expensive in copper!

 

[fowlerboi]

Am I right in thinking though on a 15L water heater it only has a pressure relief not a temp pressure relief?

It isn't a d2 if its only pressure so no length or termination regulations. It would be like your boiler pressure relief

Over 15L it has to have a TPRV as standard

 

[ShaunCorbs]

Am I right in thinking though on a 15L water heater it only has a pressure relief not a temp pressure relief?

It isn't a d2 if its only pressure so no length or termination regulations. It would be like your boiler pressure relief

Over 15L it has to have a TPRV as standard

Yes 30l and above has both

No still can be temp as it’s pressure related