Hot water tank and pressured pump

[Delboy21]

I am fitting a 3 bar pump to increase my poor pressure and all the info says to connect the hot side inlet of the pump on the pipe coming out top of hot tank I would think that if. I did that wouldn't it just keep pumping the water back up the vent pipe to the cold water tank thanks for any advice

 

[ShaunCorbs]

you need an s flange

also you need a dedicated cold feed from your cold water tank

 

[Delboy21]

you need an s flange

also you need a dedicated cold feed from your cold water tank

 

[Delboy21]

The pipe coming out the top of my hot water cylinder comes out on a 90 degree bend goes for about two feet and then it t piece's one going down the other going up into loft and bends into top of cold water tank I'm under the impression if I put the pump inlet to the two feet part wouldn't it just pump up the pipe and into cold water tank

 

[ShaunCorbs]

The pipe coming out the top of my hot water cylinder comes out on a 90 degree bend goes for about two feet and then it t piece's one going down the other going up into loft and bends into top of cold water tank I'm under the impression if I put the pump inlet to the two feet part wouldn't it just pump up the pipe and into cold water tank

yes it would thats why you need to alter the pipework to suit

what are you trying to do boost all hot water outlets?

 

[Delboy21]

Hot and cold colds no problem have it sussed just he hot just doesn't seem right how would I reroute pipework

 

[ShaunCorbs]

Hot and cold colds no problem have it sussed just he hot just doesn't seem right how would I reroute pipework

leave the vent (top pipe) in place and cap the one going down (just after t)

connect the s flange to cylinder

take the s flange port to pump inlet

connect the pump outlet to the pipe going down that used to be connected to the pipe going up

hope this make sense

 

[Delboy21]

Brilliant finally understand great info. But excuse me don't know what an s flange is or does can you explain thanks for your help

 

[ShaunCorbs]

Brilliant finally understand great info. But excuse me don't know what an strange is or does can you explain thanks for your help

you mean the s flange ?

 

[Delboy21]

you mean the s flange ?

Yes

 

[ShaunCorbs]

Yes

in easy terms its to stop the pump running dry due to air / sucking air from the vent

a nice little pdf explains it in more detail

http://www.free-instruction-manuals.com/pdf/pa_1042379.pdf

 

[Chalked]

Sean means a Surrey flange...
I like to use an Essex boss.

 

[Delboy21]

in easy terms its to stop the pump running dry due to air / sucking air from the vent

a nice little pdf explains it in more detail

http://www.free-instruction-manuals.com/pdf/pa_1042379.pdf

 

[Delboy21]

Cheers mate that's great you have explained it well while I. Am talking to someone clever can I ask you a question it's a twin impeller pump when I connect the cold side can I just cut the cold pipe coming from loft storage tank and connect to pump and back out pump back to the pipe

 

[Harvest Fields]

you need an s flange

also you need a dedicated cold feed from your cold water tank

Also a lot of manufacturers say that both feed pipes should be 22mm. Just incase you have done them in 15mm

 

[ShaunCorbs]

Cheers mate that's great you have explained it well while I. Am talking to someone clever can I ask you a question it's a twin impeller pump when I connect the cold side can I just cut the cold pipe coming from loft storage tank and connect to pump and back out pump back to the pipe

are you boosting all the cold tank feeds if so just make sure you tank is big enough must be 50 gallons (225L) +

and yes the one that supply's your tank cold to your outlets but dont boost the cylinder cold feed

 

[Delboy21]

I still looking again at the hot water system explanation that means there's no connection to the pipe going up to the loft

 

[ShaunCorbs]

I still looking again at the hot water system explanation that means there's no connection to the pipe going up to the loft

as long as that pipe is connected to the cylinder your fine (you need that as its the vent for the cylinder)

you dont need to touch that

 

[Delboy21]

But the pipe coming out top of tank goes to the pipe up into the loft if I take that pipe cut it and send to pump then to the pipe going down the tanks then not connected to the pipe going up to loft

 

[ShaunCorbs]

hope this helps

"leave the vent (top pipe) in place and cap the one going down (just after t)

connect the s flange to cylinder

take the s flange port to pump inlet

connect the pump outlet to the pipe going down that used to be connected to the pipe going up

hope this make sense"

 

[Delboy21]

Got it thanks. For all your help much appreciated

 

[lame plumber]

have a local plumbers number to hand, you may well need it, take care installing your surrey flange, too much force can crimp an old cyl

 

[Best]

Just get a local plumber to do it for you. You sound like you are struggling.

 

[spanner]

I am fitting a 3 bar pump to increase my poor pressure and all the info says to connect the hot side inlet of the pump on the pipe coming out top of hot tank I would think that if. I did that wouldn't it just keep pumping the water back up the vent pipe to the cold water tank thanks for any advice

Wow 3bar press. You must have a basement or a few flights of staircase.
Yes the pump and @3bar has to have its own independent Feed or feeds.
Otherwise you'll have the system inducing air when someone turns on a hot tap and you'll probably find the shower spluttering if you "tee" into other pipework to frrd the pumps supply.