Search the forum,

Discuss Replacing stopcock, which size in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Status
Not open for further replies.
Ok, I've ran the 6 second test at the kitchen tap which is about 10 meters from the stop tap, and again at garage mounted tap about 1 metre from the main. Both with and without an electric shower running. 13 LPM is what I can deduce... So I'm miles away!

Tried again with two toilets filling and it dropped to 11 LPM

Just about to order a pressure gauge to test pressure.

Guessing I'm screwed at that
 
Ok, I've ran the 6 second test at the kitchen tap which is about 10 meters from the stop tap, and again at garage mounted tap about 1 metre from the main. Both with and without an electric shower running. 13 LPM is what I can deduce... So I'm miles away!

Tried again with two toilets filling and it dropped to 11 LPM

Just about to order a pressure gauge to test pressure.

Guessing I'm screwed at that

I have told you before you should testing the lpm and the pressure ( standing/operating ).

Doesn't look to good with what you have got
 
That's what I'm ordering a pressure gauge for as mentioned above.... There's no way to test pressure without is there?
 
Do these other taps have ballafix valves?
Flexi pipes?
Other restrictions?
 
Yep, all taps and toilets have Flexi pipes and valves in place. I did try the garage tap which is actually less than a metre away and straight off the pipe... However less accurate as it takes a lot more turns to get full flow from it.

That gave me 14LPM
 
The pressure hasn't been measured properly, however it's not in question and my plumber agrees given what he has seen. It's easily above what is required for an unvented.
Are you testing from the same place as this?
For a true reading take the pushfit bend off above the stop tap, put a piece of hose or pipe on and test from there.
The house may be full of hidden gems like the restrictive ballistic valve
 
This was from the kitchen tap....

Will do as you suggest, try without restrictions. I may try the garage one again with two buckets... Chuck one under for 10 seconds then remove....
 
Latest on the garage tap is 14 LPM running on full.

Would it not be useful to try a new stop tap on 22mm given that my 20mm is reduced to 15mm prior to the stop tap already?
 
Edit.... Just realised when looking at the picture at the start of my own thread, I fitted a ball valve and it was only half on!!! This is between the garage tap and the main.... Anyway, 2 tests... 26 and 30 LPM... Winner!!

Question for you chaps.... Just been talking to my neighbours who both have big combis running decent sized power shower heads, with no noticeable detriment when using another hot in the house.... I think my view on combis is based on a crap one in my old house that didn't pump very well and was notable when using a hot tap whilst having a shower.

I'm guessing combis have come on quite a bit!? Is it possible that a modern combi can run two power showers? And can I power two electronic valves for two central heating rings (2 nests) with a decent sized combi?
 
Last edited:
if you have the space viessmann 222 with a properly designed system with maybe an accumulator you would be golden
 
Thanks Shaun. The unvented was going to be situated in the back corner of the garage, so I imagine it'd be similar footprint? This seems to be a halfway house.... What's the efficiency like compared to an average unvented? And is there a contingency should the combi stop working for hot water?

Yep, that's mine with the PTFE Scott. It's entirely hidden so didn't need to be neat :)
 
yes same foot print and the same if not better but no, no elec immersion
 
Apart from the lack of emersion and annual service, what's the downside compared to unvented?

Imagine the cost will be similar given the outlay for the unit (I had budgeted ÂŁ3000-ÂŁ3500 for the unvented).

And can I use with 2x CH rings with a potential underfloor add on..... And nest :)
 
other than less stored water non

speak to your installer but should be

and yes
 
Cheers Shaun, seems like you've given me a real credible alternative here.... Thanks.

I think the next step is to get this pressure checked first and foremost....

From reading, it seems I may still need this 22mm feed?
 
Cheers Shaun, seems like you've given me a real credible alternative here.. Thanks.

I think the next step is to get this pressure checked first and foremost..

From reading, it seems I may still need this 22mm feed?

its best so just come straight out of the 20mm alk with a 20-22mm stop tap
 
Excellent.... I'll try and source one. Should I bother my plumber now for just a pressure check given my 26/30 LPM readings?

Also... Should I direct all 15mm feeds to the various colds to where the boiler sits for post boiler balancing, or am I ok spurring off the 22 on the way to the boiler... Guessing the first suggestion so as not to reduce pressure to the new boiler
 
I would to check, no harm in double checking also get the pressure static (no outlets open) and dynamic (one outlet open)

And yes 22mm straight to the boiler
 
Combi boilers have improved alot another option is this one from Alpha innovations i recently went on a training day and was impressed with its output they had a working model there supplying 4 outlets at the same time , someone on here will shoot me down but personally i would give one of these units serious consideration , you can have a immersion heater added in the model with seperate storage and if it could be installed central to you property it would save on water useage.cheers kop

Screenshot_2017-08-14-06-12-53.png


Screenshot_2017-08-14-06-13-15.png
 
Opened a right can of worms here :D

Thanks kop. I'll certainly have a look at that.... My thinking is now cost orientated. Can I get two digital power showers going through a boiler with minimal heat change, integrate 2 CH rings with a nest on each, with availability to add one wet floor ring... The contingency of an immersion would be a bonus given the almost inevitable circumstance of the boiler going down at some point.

Worth pointing out that one power shower has a 3 metre minimal drop on 32mm pipework (couldn't get it any lower without major work due to stack location). So the flow doesn't need to be 30 LPM (obvious extreme). Also the climb to the furthest shower is probably 10 metres into the loft where it will connect to a digital mixer

The other power shower will be over a bath with what will be a 40mm waste if needed

Do any of these requirements rule any particular system out?
 
For this joint, the 20mm/22mm stops are none existent as expected. Think I'm going to have to go up with a Philmac coupler, into a 22mm bend, then run a tap after that....

I love a challenge
 
I could, but with the space I have, it would be a struggle.... With the Philmac I can get the piece to fit on the pipe, the coupler being 132mm tall (only question is how much mdpe I need to fit into it), 22mm bend, then the tap after that... Otherwise I'll have to site the tap further away into the garage. Least amount of connections and all that....

The bend is inevitable I'm afraid

Or 20mm mdpe stopcock, 20mm bend onto the Philmac... How do these plastic stop cocks fair for longevity? Compared to say a peglar brass 22mm?
 
Last edited:
One plumber I work with insists on upgrading to 22mm on mains pipe at least as far as boiler and kitchen, reckons it improves performance of showers etc when mains fed. And as you say, megaflo needs 22mm.
 
Thanks gas

This will be going to the boiler. My plumber also suggested 22mm hot upstairs to both showers for that very reason, which I've laid in wait...

I've decided to relocate the stop tap in the garage, couple metres into the house and much easier to get to. Assume no issues in resiting this?

Just need to work out how to turn the outside main off. Found the meter grate with a plastic tap like thing next to it. Seems to just turn on a spindle?
 
Any chance of a pic of the meter and said tap ?

And no problem other than digging up and moving the stop tap
 
Yes, I was thinking of an accumulator, that would help if someone ran a tap, shower, flushed the loo, or used washing machine at the same time as you were trying to have a shower. Replace 15mm pipes with 22 would ensure no restriction to flow. Worth a try.
 
Fraid not Shaun, not yet anyway... Just got on my sun lounger . I'll post one a week tomorrow :D

Stop tap currently comes up at side of downstairs waste toilet. So going to run 22mm into garage and mount a tap in there.

Cheers gas, Shaun had previously mentioned accumulator. That's now my primary choice with his recommended boiler, the Vaillant. Especially since seeing the lovely touch screen it comes equipped with.... Will probably save me buying two nest units for my duel circuits
 
Actually on reflection, I probably can't run duel circuits off the Viessmann (not Valliant)... I presume?

See below for picture of similar valve to mine

Screenshot_20170820-090407.png
 
Actually on reflection, I probably can't run duel circuits off the Viessmann (not Valliant). I presume?

See below for picture of similar valve to mine

View attachment 30666


Just caught the end of this and only read the first page , hi flow combi could be the one instead of the unvented system ,, . 50l stored hot for when 2 outlets being used ,? May of already been said ,. Good luck
 
Actually on reflection, I probably can't run duel circuits off the Viessmann (not Valliant). I presume?

See below for picture of similar valve to mine

View attachment 30666

Dual circuits

And just turn the tap off (like a normal stop tap)
 
Dual CH, upstairs and down. I was going to run with two nests, one hooked to hot water... All via three 2way valves
 
Do you want them to be controlled from your phone or just stnd zones ?
 
Status
Not open for further replies.

Reply to Replacing stopcock, which size in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Creating content since 2001. Untold Media.

OFFICIAL SPONSORS

OFFICIAL SPONSORS

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock