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It's usual to measure from the base rather than the top the tank to the outlet. It usually gives a slightly pessimistic answer, but it does indicate the worst case, which, as you will appreciate, will occur if the outflow rate from the tank is greater than the inflow. You may be able to...

Had similar symptoms with our old washing machine not pumping out water when full. After years of (ab)use, the suspension had settled a bit, kinking the hose from the drum to the pump. The weight of a full (over)load plus water kinked the hose further, just far enough to pinch off the water...

To make a piece like the one in your piccie, I would consider just using hand tools. For the groove in the side, use two pieces of aluminium stock half the finished thickness. File bevels on the sides then rivet the pieces together with countersunk aluminium rivets. Rivet it up before filing...

A 3KW kettle boils, and switches itself off after a couple of minutes, but a 3KW immersion heater usually takes a few hours to heat a cylinder full of water. They present two very differenty duty cycles.

As far as the terminal allocations you mentioned go, here's a few questions to ask yourself that may help:- Is mains voltage present anywhere in the oven even when all the oven controls are turned off? What turns the oven on and off? Does the fan run all the time, only when the oven is...

If you put the cistern in the loft, don't neglect the precautions against frost. The relatively small quantity of water in a WC cistern will freeze a lot faster than a cold storage tank.

Lift the float (the bit attached to the shaft with the cross on top) up by hand, and see if that shuts the valve. If it does, lower the float level a bit by turning the shaft with the cross on top. If it doesn't, it's probably time to overhaul or replace the fill valve.

Bear in mind that many (most?) 'transformers' supplied for ELV lighting are really Switch Mode Power Supplies. SMPSs have very different characteristics to a 'proper' transformer, so the blurb may indeed be correct, as long as the fittings are supplied by a transformer, and not an SMPS. The...

There is much to be said for fitting fluorescent lights in a kitchen. Some consider the fittings too industrial looking, but a kitchen is a place of work, so you need good, efficient lighting. Spotlights are not such a good idea - they are specifically designed to cast small pools of...

Running a gravity cold feed to the existing shower mixer would usually be a better solution to the problem. Differing water pressures for the hot and cold supplies often ends up causing a hatful of headaches, from over-sensitive temperature adjustment or wildly fluctuating water temperatures...

I've been asked to look at a 2D bathroom light fitting for a friend I will be visiting over Easter. The fitting initially strikes as expected, but flickers randomly whilst lit. Changing the tube and starter have made no difference, but removing the starter once lit stops the flickering. Maybe...

There's nothing unusual in a system not draining after the stop tap is closed. there's no way to get air into the pipework to relieve the vacuum as the water drains. If you have a conventional cold storage cistern in the loft, run off a couple of gallons of HOT water. Once the level in...

Unless the verticals of the liner are set plumb in all directions, the door will always tend to swing open or closed, depending on the direction of the error. It is possible to adjust the hinge alignment later, but easier if you can get it plumb in the first place

4 bar static pressure sounds like a good starting point, but you also need to know the flow rate, and the residual pressure at that flow rate before deciding on the best system. It is possible the water pressure may dive dramatically if you draw off more than the smallest trickle of water...

If that gulley is for a wetroom floor, you may be better off with something like this McAlpine trap. Just fits a vertical 4" pipe. Accepts a round or square grille to taste. The trap lifts out of the top for cleaning. No need for the 'P' trap under the floor slab then. The top flange...

Puts me in mind of the story of a company that tried to sell some of their "revolutionary new drill bits - tough enough to drill anything - hard enough to hold their cutting edge" by sending out free samples to a local engineering company. The office handed the samples on to the shop foreman...

That's what makes a trap work! The short 'uphill' section holds back enough water to fill the pipe immediatly below the waste fitting. That water seal is what stops smells coming back up the plughole. The one you have there does appear to have been cobbled together out of bits left over...

http://www.bearingstation.co.uk/products/O_Rings/Nitrile_O_Ring_Metric/25mm_-_49.99mm/OR32X3.5

Fit some graduated blocks under the 4" pipe to achieve a 1 in 40 fall. Only fit a macerator if you intend moving house before it fails.

IIRC disabled access requires 1 in 12 maximum gradient, and a 1600mm level landing at each turn, and at each door/gateway. Having spent a fair amount of time pushing a wheelchair, I would personally prefer to see steeper gradients to a multitude of turns, but the landings are an important...