speed fit on secondary return

[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

 

[Mike Jackson]

It's got nowt to do with whether it will fail or not. The pipe hasn't been tested for use on secondary hot water circulation systems because it isn't a common enough application to warrant the expense. It is therefore not approved for use for this application.

 

[Gray0689]

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

3 to 3 1/2 bar pressure reducing valve
Only as hot as normal hot pipework

 

[SafeGasInstall]

3 to 3 1/2 bar pressure reducing valve
Only as hot as normal hot pipework

steve did mean under not normal operation

 

[sheff paul]

It's got nowt to do with whether it will fail or not. The pipe hasn't been tested for use on secondary hot water circulation systems because it isn't a common enough application to warrant the expense. It is therefore not approved for use for this application.

Decided to bite the bullet,ripped out all the plastic,repiped in copper,would have been ok in plastic,still got short stabs connecting the sanitary,but none on the ring main,felt an air of superiority,until I felt the pain of buying copper at todays prices.

 

[SafeGasInstall]

how much was it 15mm and 22mm

 

[sheff paul]

how much was it 15mm and 22mm

about 4 mts of 15mm

 

[SafeGasInstall]

I was asking for the price ?🙂

 

[Gray0689]

I was asking for the price ?🙂

£1.10 a metre

 

[kimbo]

The hotter the pipe gets the less pressure it could take so If you were really unlucky and your pressure reducing valve failed and your thermostat failed I think you could very easily blow the pipe like you see has happened on some heating systems.

 

[Howsie]

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

Why not?

 

[Gray0689]

Why not?

Because its not very energy efficient to do so

 

[Howsie]

Because its not very energy efficient to do so

Really depends on the customers requirements. If they have a 24/7 requirement and the pipes are lagged properly then I can't see the problem.

 

[nicro3]

The whole point of having a HWSR is so hot water is instant with no deadleg and waiting, also negates legionella.

 

[Gray0689]

Really depends on the customers requirements. If they have a 24/7 requirement and the pipes are lagged properly then I can't see the problem.

We are talking about a domestic setting
Not commercial or industrial
There won't be a 24/7 requirement so it would be inefficient to have running all the time

 

[Gray0689]

The whole point of having a HWSR is so hot water is instant with no deadleg and waiting, also negates legionella.

Correct but still it don't need to be running 24/7 in domestic