Sounds interesting. Things you need to understand, I'm on an offshore island so can't nip to the shop to get parts! I'm working on a mixture of metric and imperial pipework/fittings so it's never simple. The owner doesn't understand about plumbing but installed this system many years ago, then chopped and changed it as he thought fit! There are two systems in the house but are probably connected somehow, re the dripping tap in one side when flushing the heating on the other!
I love sealed systems but not knowing what the owner has done makes me reluctant to alter what's there. Today I removed a gate valve in the feed line that was locked closed. No simple job, I had to dismantle shelves and remove a support board to gain access. Also replaced the pump. Guests are coming next week so I will fire the system up so they have heat then alter after new year when I have all the fitting ready.
Thank you guys for your input, I have learnt something new so that is always good.
[automerge]1576968752[/automerge]
You could also consider a combined vent and cold feed (like mine, from new) but you would need to install a 3/4 ins vent for this.
Never heard of semi sealed system.
Where is the combined vent/feed in your system? This one has 3/4" cold feed most of the way down to boiler so easy to change 1/2" from feed tank to just under loft floor to 3/4".
[automerge]1576968752[/automerge]
You could also consider a combined vent and cold feed (like mine, from new) but you would need to install a 3/4 ins vent for this.
Never heard of semi sealed system.
Where is the combined vent/feed in your system? This one has 3/4" cold feed most of the way down to boiler so easy to change 1/2" from feed tank to just under loft floor to 3/4".
[automerge]1576968753[/automerge]
You could also consider a combined vent and cold feed (like mine, from new) but you would need to install a 3/4 ins vent for this.
Never heard of semi sealed system.
Where is the combined vent/feed in your system? This one has 3/4" cold feed most of the way down to boiler so easy to change 1/2" from feed tank to just under loft floor to 3/4".