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    Wiring in conduit - Capacity and splicing questions

    I'm planning to put some sockets and new 2 way lighting circuit in my garage, all in surface mounted conduit, I also need to run a earth bond from the CU to the gas pipe entry to the house, the gas is 6 m along the planned conduit run. The new sockets will be a new circuit fed directly from...
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    Determining ABV setting from min flow rate / pump curves etc

    Vaillant 428 - Min flow required approx 20 litres/min (0.33 litres/sec or 1200kg/h) Pump Grundfoss Selectric 15/50 (set at III) - Pump curve here: http://www.plumbnation.co.uk/site/grundfos-ups-15-50-selectric-130-bare-pump/Grundfos%20UPS%20Selectric%20Pumps%20Brochure.pdf ABV Honeywell...
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    Vaillant EcoTec 428 configuration issues for Hot Water Only

    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...
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    What weight SDS drill?

    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...
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    Putting a square hole through 30mm concrete

    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...
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    Pipe inserts: Do I need larger diameter pipe if I use them?

    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...
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    TRVs (Honeywell) have VERY limited (if any) adjustment range

    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...
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