speed fit on secondary return

[sheff paul]

Just changing some dodgy waste pipes on a dubious bathroom job installed by a DIYer putting speed fit in as some has already been fitted in for some time before ,then notice's the unvented has a secondary return fitted.Do I finish it off in plastic and get done for lunch,or do I rip it all out and get home late,this job is a favour money free one.Has anyone fitted platic on a secondary return set up,yes I know you should not use it.

 

[SafeGasInstall]

i dont see why not to use plastic on a secondary return , do you ?

 

[SafeGasInstall]

as long as there is a pump and nrv

 

[sheff paul]

saw something on speed fit info about not using it,yes it is pumped and there has been some in for quite some time

 

[plumber0808]

I have seen it done quite a few times and done it myself on first fix.

I did see last week in a magazine it shouldn't be used on constant hot water circuits. The mag is in the van but haven't read it yet.

 

[buckley plumb]

would have thought its ok if it can take boiler primarys temp then sec hw should be ok

 

[sheff paul]

would have thought its ok if it can take boiler primarys temp then sec hw should be ok

I was under the same impression boiler circs are far hotter than a secondary circuit 10 metres away from the cylinder

 

[Gray0689]

It be fine

 

[SafeGasInstall]

i think to be 100 % accurate a phone call to manufacture will tell you , and then you can update us here PLEASE i hope the secondary return was not piped with overflow/condense plastic , was it ? lol

 

[sheff paul]

It be fine

Thanks for that lads looks like I will be done for lunch

 

[markfxy]

used it a lot on secondary's with no problems don't see why you can't

 

[SafeGasInstall]

is still lunch ?!lol

 

[sheff paul]

is still lunch ?!lol

hope so but things usaually go pear shaped

 

[plumber0808]

looks like I will be done for lunch

You have done it now..... I hope you haven't made plans.

 

[plumber0808]

Here is hep 2 0's say. I bet they are all the same as well.

Hep2O - The Professional Flexible Push-fit Plumbing System from Wavin - Ring Main Installations - push-fit plumbing, flexible plumbing, Hep2O, Hep20, push fit plumbing, domestic plumbing, demountable plumbing, plastic pipes and fittings, plastic plum

 

[sheff paul]

Hep20 say its a no no to use on secondary returns or ring mains. I dont know about other makes. See hep20 website "frequently asked" in technical section

please delete this post,as I was thinking about taking the bike out after lunch

 

[Megaflo-Experts]

Most plastic pipe is not rated for secondary returns, and most manufacturers specify this!
Secondary return is very different as it must withstand hot water for a much longer period of time; potentially 24/7!

 

[plumber0808]

You have done it now..... I hope you haven't made plans.

Told you. As soon as that sentance " i will be done by lunch is even murmured you might as well prepare for a late one

 

[Gray0689]

please delete this post,as I was thinking about taking the bike out after lunch

Put the secondary return on a timer ten it's not continuous

 

[Mike Jackson]

Straight from the horses mouth.

Continuously operated re-circulating systems (secondary hot water circulation / ring main installations)
A continuously operated re-circulating system is a water-replenished circulating system which is maintained at a constant high temperature to provide a constant source of hot water. Continuously operated re-circulating systems are used to distribute constant hot water to draw off points that may be distant from the source or hot water storage vessel. Continuously operated re-circulating systems are very different from conventional hot water supply and central heating systems found in domestic properties, for which our products have been tested to, under either BS7291 Class S or WRAS approval standards, and for this reason Speedfit products must not be used on any continuously operated re-circulating systems as they are not approved under the current version of these standards.

Look at John Guest Speedfit - The World Leader in Push-fit Fittings, Pipe and Plastic Plumbing Systems - JG LAYFLAT POLYBUTYLENE PIPE IN COILS click the technical specification tab.

 

[plumber0808]

^^^Same as hep's statement word by word I think.

 

[markfxy]

its not continuously operated with a timer and a stat you would never run a secondary return 24/7 it'll run at a lower temperature than central heating and probably for the same length of time in the winter

 

[kozak1968]

My house has a speedfit secondary return in for 14 years. Its still o.k..... These companies always want a get out clause for the warranty. I've used all the brands at one time or another and never had a problem.

 

[dancinplumba]

But unvented temps can get very High, and higher pressure than CH systems

 

[SafeGasInstall]

But unvented temps can get very High, and higher pressure than CH systems

max operating temp 65 degrees
max operating pressure 8 bar
when i worked on new build we tested h20 on 10 bar pressure