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Nope no vessel or non return. I can see all pipework its all exposed, the sketch is the layout of the pipework and how it is. I assume no one came across this before.. but its weird that the first post or so, say whats wrong with it???

Yes but being half inch does this make it unsafe.. as its accessible should i change cold feed to 22mm.

What about expansion.. like is this system ok to use..

No the sketch is all thats in the heating system.

System was drained to make some changes and wondering will this affect filling back up.. yes but its only 15mm for cold feed..

but there is no vent pipe??

Hi i was looking at a ch system today, its fed from tank in attic and using old potterton primaf boiler, problem is... it has no vent pipe over the f&e tank... and the feed from the tank is only 15mm. I will try attach a sketch now too..

thanks for reply, pretty much the same draining process so.. Oh im just saying incase something like that does happen.

Hi guys, i want to change a dhw cylinder , i have changed one heated by a gas boiler before so i just want to confirm that the principal remains the same for doing the job with oil boiler; Do i just turn off boiler, isolate f&e tank (its open vented) and drain from lowest point?? I am also...

so no one has any comments on this procedure, well apart from smart comments

no commissioning the test boiler in the workshop. Remember now only at learning stage so would these steps be correct.?

Hi guys hope someone can help me to understand this, even though im studying gas at the moment i unfortunately have a 'part' time teacher- or as it seems anyway!! Im trying to understand this process so anyone with advice please advise. My check list goes as follows: 1 boiler loaction...

not yet rgi still doing the course but looking back on notes from gis. So does that procedure seem right?

thanks for responses guys.. Ok about the gas rate since being a bulk tank (and having no meter) wont be able to get badge number from that but will be able to get manufature instructions. Looking over notes i had, i had written to get gas rate of bulk tank without meter was: 1. check burner...

hi guys this question is for you great gas technicians out there. Im trying to figure what the purpose of a by pass on a gas oven is- is it anything to do with keeping the burner lit when the temprature set by the stat is reached?? Also guys can anyone explain how you would get the gas rate...

thanks man, ya agreed nice step. dont get ahead of myself.

Hi guys will be replacing dhw at weekend, i have never done this before but hoping all goes well.. Im just curious to know about the refill of the system any recommendations will help as i expect this is where experience comes into play. Hopeing all goes well with replacing and fitting...

thanks for reply. Hoping to have A go off trying to refit the spring first, just hoping to see a disassembled 1 to see the concept.