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Discuss s plan in the Plumbing Jobs | The Job-board area at PlumbersForums.net
any one see anything wrong with this eg t rule etc sealed system
View attachment 27845
as normally any suggestions welcome and thnx again
No PRV to expansion vessel and it's discharge pipe.
Probably just the way it's drawn but the blue return pipe bypasses the mag filter.
Have you drawn that ?
Well, I can't say it's wrong, cos I can't tell if I'm reading the drawing right so excuse me if I've misunderstood Shaun. I would put fill/expansion in behind pump. You may have done that so apologies if you have.
You want as much of system under positive pressure as poss, so neutral point needs to be close to back of pump
P.s. Don't change your day job to become a draughtsman.
Not necessarily. The reason it is always on return on modern boilers is because the pump is on the return. Hence the filling loop and exp vess position.
This entry point, (just like an open vented system where cold feed /expansion pipe enters), creates a neutral point. Between neutral and pump rear is negative, from front of pump through system and back to neutral point is under positive pressure. It will work without doing that of course but your whole system would be under a slight negative pressure and that's best avoided. You need to try and design any system with a positive pressure if possible.
This is theory and there are exceptions to the rule but in general thats the best way
No I don't think so, I'm taking it the boiler is underneath the pump and magThank you for explaining it will amend it to behind the pump, other than that anything else you see ?
No I don't think so, I'm taking it the boiler is underneath the pump and mag
Can you not just fit the pump on the return Shaun? (That's if the pump is outside the boiler I am assuming?). That would make your drawing all spot on then. Expansion vessel on suction side of pump etc. Not that it makes much difference, as long as it wasn't linked immediately after the pump, like some do it.
On another point, - I fit the PRV to the boiler pipes, where expansion vessel is not at boiler.
Tidy...what's that pipe racking called again?
Nearly there rads are done and piped up, least I can get of my knees now just tank in the loft for the hot water
View attachment 28040
Is that a domestic job Shuan??
Yes mate tbh it's been a pita all the way, walls made of straw etc
So hanging the rads and boiler was fun, and then pipe layout trying to fit everything in one joist
HAHAHA Not had to deal with straw walls yet so lucky me, love how easy Unistrut is for clipping.
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