Plumbing flange question

bradleigh1977

i will get one of those flanges, as thats exactly what i need. Dont know wehter to do it my self or i think it'll be easier and quicker to get someone to do it.

By looking at the diagram for top entry, i'm right in saying that the top exit is for the vent and the rest of the house hot water, and the side exit is to go directly to the pump? its as easy as that? Any idea what it'll set me back? or could it be £80 one bloke and £200 from another?

Thanks again for everyones input.

keystone

bradleigh1977 wrote: »

...........its as easy as that?........

Yes - just make sure you identify first whether the top of the tank is male or female. For example standard York Flanges are for male cylinder outlets and Surrey for female. The reason to use a flange is to avoid aeration. The alternative to using a flange of some description (we haven't discussed the Essex flange which goes into the side of the cylinder) is for the vent to be modified to a 45 degree angle and the shower feed to be teed downwards off that angled pipe.

Whilst you are at it then it would be a good plan to chuck out all the 15mm pipe he's put in. Techflow MIs mandate 22mm. If you are getting a new pump they also mandate fitting an isolating valve on each of the inputs / outputs of the pump so that if you call them out for a tech visit under warranty then they can isolate the pump easily. If you haven't then you will get a bill.

Any idea what it'll set me back? or could it be £80 one bloke and £200 from another?

Yes it could. Its between half a day and a days work including sorting out the pipework. Probably closer to the former but as I havent seen it in the flesh its difficult to judge and best to err on the side of caution.

Cheers

keystone

OP - if your vent pipe really is configured the way you have drawn it with a substantial horizontal offset between HWC amd CWST then the vent should be like this:



before considering the shower pipework.

Cheers

keystone

andrew-b wrote: »

keystone, it specifically says not to use york or surrey?

I was just using that as an example of consideration of male and female flanges. Sorry I was unclear on that point. Having read it again I can see how it could confuse - I'll change the wording, thanks. It says specifically not because many standard off-the-shelf Yorks and Surreys have a 15mm outlet for the shower which will be restrictive to flow. You can, of course get these with 22mm outlets. Check out the BES catalogue. Techflow want 22 as stated. They also want to flog their own Techflange.

Cheers

bradleigh1977

no thats just my rubbish drawing!!!!!

The pipe work is all fine and good from the cwst, and the vent pipe, you can see in a photo 3, goes straight up, next to the plastic cold water feed coming down to the pump.


I have just rung a man and he charges £25 an hour. And says it will take him an hour. I said i'd get the manufacturors flange, and drain the cylinder etc. Id basically say he has to take out the top of the tank, screw in the new bit, re attach the original pipe, then run a bit of pipe down to the top of the hot water in bit of the pump ( about 700mm ), and cap of the tee which did go to the pump, then fill it up.

So it ain't going to cost the earth.

Thanks again everyone.

keystone

bradleigh1977 wrote: »

no thats just my rubbish drawing!!!!!

OK ta - 'twas just a thought.

re attach the original pipe,

he's good at stretching the copper pipe going down to the taps then? The horizontal pipe as its currently shown is going to be lifted up by a couple of inches if he just refits. He will have to do some pipework.

Cheers

bradleigh1977

Yea i know, im sure it wont take him long though.

Canucklehead

Hi,

I wonder if anyone could tell me if there is any difference between the Techflange and a Surrey flange that would make any difference to the pump/shower performance? Especially as the pump is so close to the cylinder and the shower mixer.


GSR.

keystone

Techflange allows orientation of the output like a Warix after its installed. As I said Techflow want you to buy the Techflange - obviously.

Cheers