Replacing stopcock, which size

[1animal1]

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?

 

[ShaunCorbs]

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

 

[1animal1]

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

 

[ShaunCorbs]

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

 

[king of pipes]

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

 

[1animal1]

Opened a right can of worms here 😀

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?

 

[1animal1]

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

 

[ShaunCorbs]

Plasson 7110 Reducing Coupler 20mm x 25mm | Travis Perkins

Plasson Adaptors for Copper Pipe 22mm x 25mm | Travis Perkins

You could do it that way and then out in 22mm

 

[1animal1]

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?

 

[1animal1]

I've just checked and my waste is 40mm to the shower...so I should be a good for a decent flow rate 😀

 

[Gasinspect]

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.

 

[1animal1]

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?

 

[ShaunCorbs]

Any chance of a pic of the meter and said tap ?

And no problem other than digging up and moving the stop tap

 

[Gasinspect]

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.

 

[1animal1]

Fraid not Shaun, not yet anyway... Just got on my sun lounger . I'll post one a week tomorrow 😀

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

 

[1animal1]

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

 

[FG28]

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

 

[ShaunCorbs]

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)

 

[1animal1]

Dual CH, upstairs and down. I was going to run with two nests, one hooked to hot water... All via three 2way valves

 

[ShaunCorbs]

Do you want them to be controlled from your phone or just stnd zones ?

 

[1animal1]

Ideally by phone and Amazon echo... Which I know is the main complication here. Just trying to automate

 

[ShaunCorbs]

Then you would need something like as you say hive/nest etc

 

[1animal1]

I originally looked at hive.. it looks really good. I just think the nest is slightly more pleasing on the eye and more scalable with Google.... Nice tends to play to its own products from what I've seen.

What's your thoughts on them?

 

[ShaunCorbs]

TBH it's what fits your needs and eco system

There all about the same, some will work with different software some won't

 

[1animal1]

Without wanting to start a further thread...

Do you gents happen to know much about hot water loops? In regards to hot water reaching its destination faster and so using less water, wasting less of the cold in the loop that you'd ordinarily use in a normal hot water branch off.

I've done a bit of reading and can see that some countries use this a lot, especially where they suffer droughts. I'm obviously thinking of the hot water wait time, but like the idea of water save too.

As I'm fitting this new water main in the house, terminating at the new boiler site. I'm wondering if I should tap into the downstairs hot water to create a ring - I've already ran a new feed for upstairs - when that gets plumbed into the new boiler, we'll have the option to create a ring.

The reason I ask this is because I have read about some rings that feed the surplus cold water back into the tank for reheating which sounds a bit more complicated than what I am suggesting.

Thoughts?