Is a S flange out of the HWC really necessary ?

[realstokebloke]

I am fitting an shower pump (Salamander ESP 100, negative head) under the HWC in a gravity fed system.

I have run the pipework for the cold feed in, the cold out and the hot out, all in 22mm, as per spec.

But before i do the hot supply in from the cylinder, i wanted to check what's recommended by you guys if possible.

A couple of 'pro's' locally have told me i can use a compression tee off the horizontal out of the HWC and drop it down & across in 22mm to the pump for the hot feed.

Will this actually 'work' or am i better off getting an S flange fitted now?

Salamander obviously say an S or an Essex is vital.)

But...I can do the tee as above (I think) using a compression but think i'd need a plumber for the S flange and, at the end of the day, am trying to keep the costs down (& also learn as much as i can about plumbing jobs anyway out of interest).

So will i be asking for trouble with the DIY (tee out of the vertical exit pipe on the HWC) job or is the S flange route worth it for peace of mind / pump efficiency etc?

Appreciate your views / experiences - primarily as out of all the guys i've spoken to on this, none can tell me with any degree of confidence they did one last week & really know what they're doing - so i don't want some joker learning on me, possibly making a Horlics and getting paid for it.

(Appreciate too i'm obviously speaking to the wrong ones so far - but in the meantime any advice would be great, thanks.)

 

[realstokebloke]

Would it help to post a pic?

Have a boozy Jubilee celeb to do now but can do later (so perhaps make that tomorrow...)

 

[mountainman]

You can do it all three ways.
An Essex flange is best practice but can be tricky to fit, a Surrey flange is almost as good but easier to fit.
I wouldn't personally tee into the distribution pipe.

 

[jtsplumbing]

Surrey flange is the way to go ! have a look at cylinder and see if it has i blank'd off fitting on the side about 6" down (second'y return tapping) Essex flange you need more experience or you will finish up replaceing cylinder !! if you tee into hot pipe you could deaw air into pump causeing damage, Cheepest place iv'e seen surry flange Wicks , about £18.

 

[kay-jay]

Most shower manufacturers actually recommend tee ing downwards from the horizontal outlet with a pumped system. Check out aqualisa website for diagram

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[kay-jay]

As above ......the reason being flanges offer a lot of resistance and also air bubbles do not travel downwards....

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[barronbathrooms]

If you do not follow Manufacturers instructions they will not honour there guarantee. If you fit direct to hot water outlet there is a greater chance of air causing problems with the pump. I always install Essex flange or Surrey fitting!

 

[Guest123]

Yes, fit a Surrey or Essex flange.

 

[kay-jay]

There is a big difference between pump mi's and shower mi's for a pumped system. So who do you trust?......... Like i said in earlier post check aqualisa website for diagrams on how to plumb a pumped feed. Pumps all work on same principle.....shower manufacturers don't like flanges cos of restrictions affecting shower performance

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[kay-jay]

In fact ifirc the only flanges they recommend is a warix

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