Re: [OT]Shower Pumps

["Neil Fuller" <neil@xxxxxxxxxxxxxxxxx>]

Dean

I'm actually a sparks rather than a plumber so some of the WRC regs are a
bit beyond my knowledge  .. . .

As far as the feeds to the pump are concerned, they should certainly be in
22's. If you are using a 3 bar pump (in fact, if you are using any pumps
really), you should use an essex (aka Sussex) flange to supply the HWS from
the calorifier. An essex flange provides a direct feed from the side of the
calorifier and prevents the pump pulling in air down the expansion line and
also offers better temperature performance for the showers by preventing a
hot tap elsewhere in the house affecting the flow to the pump.

The flows out of the pump to the mixer valves should ideally remain as
22's.
dropping down to 15's will restrict the max flow and may disappoint!

It's probably a good idea to put isolation on the flows to each shower. If
you have a shower fail, you can still use the other one, and obviously, you
need isolation on the flow to the pump (put it as near to the cistern and
calorifier as possible).

I've recently been using the Pegler full bore 1/4 turn lever valves
(Screwfix 17293). They are far, far better than gate valves which have a
tendancy to seize up and/or fail to fully close off the flow.

Yes, you should bridge the pump with earth bonding and cross bond from hot
to cold.

Hope that all helps- post back if you need any further advice.

Best regards

Neil
----- Original Message -----
From: Dean Smith
To: Neil Fuller
Sent: Thursday, April 01, 2004 1:35 PM
Subject: Re: [ukha_d] [OT]Shower Pumps


Neil

Thanks for the offer of more info. Its frustrating trying to find concrete
info on the web really.

Currently we have one shower via a B&Q 1 Bar "EasiBoost" Pump
located in
the airing cupboard. Its fed from a 15 mm feed direct from the water tank
(loft) for the cold and a 15mm tee off the 22mm hot feed that comes off the
HWC (also in airing cupboard). (The 22mm actually comes of the tank
horizontally then tees into a vertcial 22mm pipe. the shower feed tee is
just below this. I presume the upper "leg" from the 1st tee is to
the Vent
to the Tank.

The plan is to replace the 15 mm hot and cold feeds with 22mm to a new 2/3
Bar pump. then split the 22mm pump outlets - re-use the current 15 mm pipes
to the existing shower - and add new 15 mm feeds to the second shower (a
thermostatic mixer). My understanding is that there shouldnt be a problem
with this. but would like to know now if there is :-)

I was intending to add non-obstructing valves both before and after the
pump on hot and cold for ease of maintenance really. Are they any
regulations governing what should be capable of being isoloated and what
shouldn't ?

Should I be adding any earth bonding to bridge the pump (there is none
currently) ?

Many Thanks

Dean
----- Original Message -----
From: "Phil Harris" <phil@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, April 01, 2004 5:02 PM
Subject: RE: [ukha_d] [OT]Shower Pumps


Actually I think a lot of us would be - I'm hunting out pumps at the moment
too.

Phil

> -----Original Message-----
> From: Rob Mouser [mailto:groups@xxxxxxx]
> Sent: 01 April 2004 16:49
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] [OT]Shower Pumps
>
> Hey! CC me too! It may be off topic but I'm interested :-)
>
> Rob
>
> -----Original Message-----
> From: Dean Smith [mailto:dean@xxxxxxx]
> Sent: 01 April 2004 13:22
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] [OT]Shower Pumps
>
> Neil
>
> Many Thanks
>
> As it happens I do intend to add some additional flow
> switches for switching of the extractor fans ;-) but mostly
> my questions concern the plumbing :-) so I'll mail off-list.
>
> Thanks
> Dean
>
> ----- Original Message -----
>   From: Neil Fuller
>   To: ukha_d@xxxxxxx
>   Sent: Thursday, April 01, 2004 11:10 AM
>   Subject: Re: [ukha_d] [OT]Shower Pumps
>
>
>   Dean
>
>   I've installed lots of Stuart Turners and never had a call
> back on them.
>
>   They are noisy but no worse than other makes. You can put them on
>   antivibration mounts and use flexible connections but they
> do still make a
>   noise.
>
>   Personally, I have an ST Monsoon 3 bar twin impellor pump.
> It works very
>   well with two showers, although there is a slight but
> noticible drop in
>   pressure when the second shower is turned on.
>
>   It is important to use a good quality shower in this
> application otherwise
>   you may find temperature instability a problem - Expect to
> pay upwards of
>   £200 for the shower mixer alone!
>
>   As this is rather OT (unless you are going to automate it
> in some way - and
>   the inbuilt flow switches dont count!), then probably reply
> off list if I
>   can be of any further help.
>
>   Regards
>
>   Neil
>   ----- Original Message -----
>   From: "Dean Smith" <dean@xxxxxxx>
>   To: <ukha_d@xxxxxxx>
>   Sent: Thursday, April 01, 2004 9:52 AM
>   Subject: [ukha_d] [OT]Shower Pumps
>
>
>   > Anybody any recommendations for Shower pumps.
>   >
>   > Currenlty have a 1bar pump running 1 shower (pumps both
> Cold from tank
> in
>   loft and hot from the cylinder) but we'd like to also pump a second
> shower.
>   Would make life easier (space+plumbing) if I can replace
> the existing pump
>   with something a bit meatier and serve both showers from the 1 pump.
>   >
>   > "Stuart Turner" seems popular but I'm not sure how
noisy
> it would be.
>   >
>   > Looking for 2Bar+ I guess to run 2 showers comfortably.
>   >
>   > Thanks
>   >
>   > Dean
>   >
>   >
>   > [Non-text portions of this message have been removed]
>   >
>   >
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