Teeing boiler Prv with condense.

[stratplus]

Does anyone combine the boiler Prv with the condense? I always though solvent weld was no compliant as part of Prv pipe run.
Any thoughts?

 

[ShaunCorbs]

you can but must be able to take the temp and trapped

 

[stratplus]

you can but must be able to take the temp and trapped[/QUOTE
So can solvent weld take 100 degrees? Though it should be PP pipe. How can you prove solvent weld can take those temperatures??

On another note is HDPE pipe all fusion welded?

 

[ShaunCorbs]

yes

 

[Harvest Fields]

Does anyone combine the boiler Prv with the condense? I always though solvent weld was no compliant as part of Prv pipe run.
Any thoughts?

I do not do it. But I am seeing it more and more nowadays.

 

[stratplus]

yes

Is that yes to solvent can take 100 degrees or all HDPE is fusion welded?

 

[stratplus]

I do not do it. But I am seeing it more and more nowadays.

Worcester/Ideal and Vaillant say to only use a Hotun tundish and either PP or Fusion welded pipe.

 

[Harvest Fields]

Worcester/Ideal and Vaillant say to only use a Hotun tundish and either PP or Fusion welded pipe.

Wouldn't use a hotun dish if you paid me.

 

[stratplus]

Wouldn't use a hotun dish if you paid me.

Why not? I’m fitting one tomorrow. 1st time. Expense?

 

[ShaunCorbs]

Is that yes to solvent can take 100 degrees or all HDPE is fusion welded?

hdpe

 

[ShaunCorbs]

Why not? I’m fitting one tomorrow. 1st time. Expense?

they dont do the claimed flow rate

 

[Harvest Fields]

They cannot take the full pressure and overflow.

 

[stratplus]

hdpe

Thought so. Only info I could when searching HDPE seemed to refer to fusion weld.

 

[stratplus]

they dont do the claimed flow rate

Two types, two flow rates.

 

[ShaunCorbs]

Thought so. Only info I could when searching HDPE seemed to refer to fusion weld.

push fit is rated for high temps

 

[ShaunCorbs]

Two types, two flow rates.

both dont the bigger one has the same size outlet hole as the smaller one

 

[stratplus]

push fit is rated for high temps

Yes that’s PP Polypropylene.

 

[tolly]

Im not sure i trust those hotuns either. Not sure how well they will perform in a few years time if that spring inside rusts.

When i spoke to vaillant about this they were happy for it to be setup like this as a last resort. The plastic isnt PP but its PVCu hight temp solvent weld.

 

[stratplus]

Im not sure i trust those hotuns either. Not sure how well they will perform in a few years time if that spring inside rusts.

When i spoke to vaillant about this they were happy for it to be setup like this as a last resort. The plastic isnt PP but its PVCu hight temp solvent weld.

View attachment 31658

Is high temp solvent weld different to a standard solvent weld? So is that black pipe in the picture standard solvent pipe?
What is that adapter that the tundish is fitted onto?

 

[tolly]

Most solvent weld sold is ABS which doesnt have a high temp rating, the pipe in the pic is high temp PVC C even. Which osma superceeded MUPVC for i think. Tundish is on a hepvo with "tundish adapter"

 

[stratplus]

Is high temp solvent weld different to a standard solvent weld? So is that black pipe in the picture standard solvent pipe?
What is that adapter that the tundish is fitted onto?

Sorry, misread the pipe. So is that a standard tundish?

 

[stratplus]

Most solvent weld sold is ABS which doesnt have a high temp rating, the pipe in the pic is high temp PVC C even. Which osma superceeded MUPVC for i think. Tundish is on a hepvo with "tundish adapter"

Standard solvent weld glue though.

 

[stratplus]

Standard solvent weld glue though.

Any reason why you didn’t use pushfit or mechanical fittings?

 

[tolly]

Yep standard solvent weld. I think if i did this again i would use pushfit though to save confusion. Only used that as im not a fan of pushfit waste.

 

[tolly]

Or fit a Viessmann with the combined PRV and condesnse

 

[ShaunCorbs]

Or fit a Viessmann with the combined PRV and condesnse

Still need high temp waste

 

[tolly]

High temp overflow?

 

[ShaunCorbs]

High temp overflow?

Nope not rated for blow off

 

[tolly]

How do you step up to 1 1/4" then. I assumed the viessmanns had a overflow sized connection underneath for that combined con and prv? Ive only ever seen one vitodens and didnt pay too much attention to it

 

[Atouchofgas]

Heard a few rumours that the hot-un Sodes water as it can’t get it away quick enough.
Lot of folk are talk about this one instead
TESLATUN - Dry Trap Tundish | Tesla (UK) Ltd

 

[ShaunCorbs]

Heard a few rumours that the hot-un ****es water as it can’t get it away quick enough.
Lot of folk are talk about this one instead
TESLATUN - Dry Trap Tundish | Tesla (UK) Ltd

Yep they do ok for boilers no good for unvented cylinders (hots)

 

[ShaunCorbs]

How do you step up to 1 1/4" then. I assumed the viessmanns had a overflow sized connection underneath for that combined con and prv? Ive only ever seen one vitodens and didnt pay too much attention to it

Straight to 11/2

Normally flex straight onto a 11/2 tee

 

[Atouchofgas]

Shaun
Not what that link says or this one
http://www.teslauk.com/pdf/7766.7793747.pdf

 

[ShaunCorbs]

Shaun
Not what that link says or this one
http://www.teslauk.com/pdf/7766.7793747.pdf

I was on about hotuns

 

[Atouchofgas]

I was on about hotuns

Sorry misread it but hotun do invented as well
hotun dry trap solution for large unvented water heaters - RA Tech UK Ltd

 

[ShaunCorbs]

Yea it's rubbish and spills over with th anything over 15lpm