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The cylinder is old but the flow through the heating coil is fine, I had wondered if things would improve with a cylinder better at dispersing the heat, I don't know if they come in different power ratings or how much efficiency they lose as the years go past. Regarding the boiler, that...

We have recently had a Vaillant EcoTec Plus 428 installed (open vent, normal hot water tank) and we (myself and the installer) are trying to get it and the system configured. We get good heating performance, but when the heating is off and we only require hot water we are struggling. The hot...

Thanks for the reply. Two more questions for you (or anyone else): I understand a heavier drill will be nicer to chase with, higher weight = less impact delivered to the user, but will a 2.4kg drill be able to do the job, just less comfortably? How important is roto-lock to do chasing...

I want to buy an SDS drill but I'm not sure what weight I should be looking at. I envisage using it for wall chasing / socket box cutting, together with general hole drilling duties. There's a Hitachi (DH24PC3) that's caught my eye as it has locking roto-stop that weighs 2.3kg, will it be...

I should probably clarify a few points too... The concrete appears similar to a concrete paving slab, it's very dense and is NOT like engineering brick it seems much harder. Also, I don't current have either of the tools I mentioned in my first post (9" grinder or SDS drill), whichever...

I need to install a cat flap in my conservatory wall, the base of the conservatory is constructed from moulded concrete panels, 30mm thick. A normal hammer drill was largely ineffective drilling holes though it, it took about 10 minutes and 3 bits to get a single hole through it. I am...

Yep, should have been clearer. The pipes will be for the radiator circuit of a pumped central heating system (3 bed semi, 8 rads). I'm tempted to run pipes in 22mm plastic for the under the floorboards part and 15mm copper up/down to the rads (the visible pipes). Is that overkill and would...

In a scenario when I would usually use 15mm copper pipe, what size plastic pipe should I use? Obviously 15mm plastic with an insert added, is going to have a smaller internal diameter (at the joint, but it will still restrict flow) than 15mm copper with no insert. By that logic I should...

I had a closer look at the valve, it's one I recognise as having seen all over the place before. It's the same valve as used in my last house, the CH there was all replaced around 15 years ago so they could be pretty old. The heads screw on with a metal collar, which surrounds a black plastic...

Sounds like that's the most likely scenario, phone call to landlord I think...

Response to D_Hailsham: I'll give fiddling with the pin on one of the rads a go, see what, if anything happens. The tops look pretty old to me so maybe it could be that. Are they expensive to get? They look like these, though I'll have a better look later, would there be a model number on...

I've recently moved into a new house fitted with Honeywell TRVs on all the rads. The valves obviously have some effect, as I can turn the rads on and off with them, but there doesn't seem to be any adjustability, they're either full on, or totally off. I would normally expect (as in other...