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I will shortly be installing a Gledhill Boilermate 2000 on an oil fired CH system with all TRVs. Before buying the Gledhill I was intending installing a std cylinder and with this in mind I bought a Danfoss Alpha pump to cope with the TRVs. Question - can I install the Alpha in place of the...

OK, I'll think about it ! As I said, I have to do a bit of replumbing to accomodate the Y plan layout, so we'll see where the existing pipework needs to be cut. If the rad can stay in, maybe I'll keep it "as is". Cheers again for the info.

I had considered leaving it (though the layout has to modified to Y plan anyway) but the irony is that in 12 years I never even realised we had the option of having it warmed by the dhw circuit. Its fitted with a TRV, so it has spent every summer stone cold.........

>> If the system has previously been used with a solid fuel boiler this radiator will have been the heat leak!! Well, I wondered if I was going to get a technical explanation such as that, but no, it was always on an oil boiler, so I suppose its just for a permanently warm bathroom rad...

Thanks Chris.

Firstly, this is not a question requiring a solution - its just to satisfy my curiosity....! I am replacing a 20 year old oil boiler which had 4 pipes running to it - indiect cylinder coil F&R, CH F&R. I was powerflushing the system today and couldn't understand why the bathroom rad...

Thanks for the info. Going back to gas, are Vokera any good?

Thanks for the warning. If I have time to find another b4 it gets hung on the wall I will do so! I am also looking at an oil boiler for another project. You mentioned Potterton - are you saying they are rubbish too (cos they are not cheap!!)

Not really a fair assessment - it was bought for a project which changed direction - all perfectly genuine. I'm still waiting to hear what's so terrible about this boiler?! BTW, its not for my own home - its for a flat I'm refurbing, BUT I will be renting it out once its done, so if its a duff...

Thanks Dave, ref the 15mm info Soggy - yes it has an internal bypass BUT it also says you should fit an external. I think the internal one is for emergencies only !!

Just what I needed to know - thanks. Is there anything else in my proposal that would conflict with Part L?

>> Why would you even consider a biasi Cos I was offered it at a price I couldn't refuse. I presume you are going to tell me they're c**p? Is so, why? Reliability? Features? Efficiency? As to the 26kw, that should have said 28kw...... No intention of touching the gas or flue - I...

I'm fitting a new Biasi Riva 26kw Condensing Combi Boiler (well the pros will fit the boiler, but I'm doing the plumbing) and have a couple of questions: 1 - CH will comprise 7 or 8 rads across 2 floors. My plan is 22mm in & out of boiler, 22mm equal Ts to LHS & RHS, manifolds at each end to...

That's worth knowing - thanks folks.

I have brazed in the past. What material do you use? Std copper tube??? What about compression fittings - wouldn't that be easier?

Thanks for the additional info. Can you recommend a "good quality" panel, as there are a lot out there. I wasn't aware you couldn't use solder connections - like I say I've not looked too far in to it yet. Why not BTW? Is it the heat, the antifreeze, or what? Cheers again.

>> It is the pressure you limit. What is the pressure? The more flow the better. Dunno - like I said I don't have the kit to test it. wouldn't it be fair to assume that if the flow rate is high the pressure would be likewise?

Brilliant - thanks.

A quick and hopefully easily answered question..... I am installing a new 26KW oil fired boiler and a 180/210 litre thermal store. Connections on boiler and store are 22mm/1". It may be gravity fed, but more likely pumped. Should I use 22 or 28mm pipe? I am assuming 28mm with converters...

We seem to have moved off topic. Can gas4you (or anyone else with a view) please respond? Thanks.