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Unfortunately it doesn't look like my boiler manual does have any plumbing diagrams. It has wiring diagrams, but nothing relating to plumbing schematics. Anything generic anyone can point me to? On the up side, I finished up the gravity fed system today and it seems to work (bar one radiator...

Camray 3 Yep. Took a while to get through, but got a friendly old boy on the phone. Well FFS. Since speaking to the Worcester guy, I found the actual manual in a bunch of paperwork that the previous owners left when we bought the property. I took the Worcester guy at his word, but your comment...

It's a Boulter Camray 40/50. That was the initial plan, but during my research, I spoke to the boiler manufacturer (or the company that bought Boulter, who then bought that company) and they said that their documentation didn't say that it could be part of a pressurised system, so it would be...

Thanks for your input Exedon. I'm really hoping this first option will work alright and I won't have to revisit it. I'll weight denso13's layout suggestion higher if it comes to it!

Yeah, that was definitely an option. Hard to weigh up the cost of a new one vs efficiency gains though. The hot water tank was in a different location in the property, but I've moved it, so it's next to the boiler, which will hopefully help when it does come to replacing the boiler. I think the...

Thanks, I really appreciate the advice and pragmatism. I absolutely agree about explaining the correct way to do things and I'll definitely give it a good go trying to move it about within the constraints I have! If it does start looking like I'll have to moving things around on a larger scale...

Mm, yeah, makes sense it would be tricky to fill. I've also got it at the back of my mind that in a few years, this boiler from '94 is probably going to die and I'll be going for a combi boiler with a pressurised system and pulling a bunch of this out. Bah, I don't know, I feel like my options...

Yeah, perhaps that's the way I'll have to do it. I was trying to be as space efficient as possible, but that's bitten me in the ass ha. Just looking at my options here... https://ukplumbersforums.co.uk/threads/combined-cold-feed-and-vent.42374/ These guys are discussing a single, combined 22mm...

Thought you might say that lol. I'll have to see what I can shuffle around tomorrow I think. Thanks for pointing the pump angle out, always better to know than be oblivious to it.

Ah, I misunderstood the image you attached earlier. This makes more sense now, thank you for explaining. For some reason I thought the vent needed to be before the pump and the feed after. It looks like I only have enough room to shuffle the pump over by about half the distance that I need for...

So this is a picture of what I actually have (annotated), hopefully you can see how that marries up to the diagram in my original post: I don't see how it would be possible for me to get the vent and feed closer than 150mm when the pump itself (plus valves) is 330mm wide?

Thanks @ericmark, as long as it's not clearly wrong then "suck it and see" works for me. Thanks @denso13, that's a great resource you've linked! Given the layout I've drawn out above, horizontally the vent and feed pipes I have are about 330mm apart, which doesn't sound ideal... As I have the...

Another day another question. Thanks for all the advice I've received so far from everyone. This weekend is going to be my big plumb up; think I have everything in place to get started now! Before I finally commit, I just had a couple more questions if you kind folk would be so kind to share...

Awesome, thanks. Full bore ball valves all over the place then!

Well there you go. Thanks for the info! I'll stick to that type then, where I can. 15mm version will be good for mains as well, I guess?

I've just picked up one of these things to provide a means of isolating the 22mm supply coming down from my large cold water tank into the bottom of my hot water cylinder: Don't get me wrong, it seems great, but hell, I'm not shutting off the main water supply to a nuclear reactor! Should I...

Ah gottcha, apologies for the confusion. Thanks again for the help!

Thanks. I was planning on T'ing off the 22mm pipes to a short, vertical 22mm section, reducing it down to 15mm, through an isolation valve (for future maintenance) and then into the auto air vent. Just checking, but you say ABV, it was my understanding that an ABV (Automatic Bypass Valve) was...

Thanks, Harry. Good to have another, more experienced, pair of eyes on it :)

To answer my own question. I don't think there is a better way to do this than installing an automatic air vent on the bridging sections, so that's what I'm going to do. I think this should be fine for the flow, but I'm slightly concerned that the air will make it's way past the bridge on the...