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I am removing a water butt with a diverter thing in the down pipe. I found that the upper pipe is 68mm ( having been upgraded inthe past) but the lower pipe below the diverter is the old 63mm. I notice that a 68mm pipe will fit over the old 63mm but it is a loose fit. Could I solvent weld this...

Generally there are two sizes of connector for sinks 11/4" (wash basins) and 11/2"(kitchen sink). The picture shows a trap with a 11/2" connector. This will have a standard thread for connecting to a 1 1/2" sink waste. Sounds as though you have an old sink with a smaller waste,or you have...

The flow to each radiator is quite slow to balance the system, most valves are only partially open. If you short the flow to the return it will create a low resistance bypass and radiators will not heat.

The oily rag was an old plumbers trick to seal off non live pipes !

Perhaps the flow rate is being restricted somewhere on the cold input to the boiler ? Measure the max litres per minute you are out of hot tap - time how long ittakes to fill a 5 litre bucket or watering can.

Changing the filter is a little more complicated - you have to run the new filter into a bucket to clear out loose carbon - quite a lot of black stuff comes out. This means carrying a bucket of water downfrom the loft each time. Then you run a tall glass of water to see if it is running clear ...

Sometimes when you connect the toilet, it goes in too far so restricting the flow because of the tight bend in the connector. Although this one looks as though the connector has an edge to stop this happening.

Are the boiler pipes going in/out of the hot tank getting hot . I.e is there flow through the hw side .

Connect the toilet into the pan connector and check there still space for large sausages !

Mostly, water meter is located outside and the householder is responsible for the pipe from his boundary in. If the leak is inthe meter or one of its immediate connections , its worth calling the water company. I think they always own the meter.

Before anything else, find out how to turn the water off up the line - outside, maybe inthe pavement. Is this some form of self powering stop cock ? How does it work ?

Hold a clip on the wall to see where the gutter would be - you really want the roof to drip into the middle of the gutter. If you have room, it would be better to screw lenghs of wooden battons or boards to the wall then mount the gutter on the wood. Get pressure treated if you can. This way...

Will the old copper tails fit into the new tap ?

Put a spirit level on the pipe to see the actual fall.

I am just a diy but I have never come accross a boiler with main flow and return pipes of 15mm. They are nearly always 22mm in domestic houses up to 4 bed detached.

What JohnD was implying is some mixer taps let the cold water run up the hot pipe thus over filling the hot tank. This happens if you have mains cold pressure but low pressre hot at a mixer tap or shower.

You' ll lose the communal emergency shut off for your flat.

A few points but only my opinion as i'm no expert : 1 Rainwater is not supposed to go down the sewer. Rainwater should go down into the earth i.e soakaway or down a rainwater drainage system if there is one in you locality. 2 Waste water must go down a sewer so as not to pollute the land 3 Any...

Generally speaking, the time clock (programmer) sends a voltage to the thermostat strapped to the HW cylinder. The thermostat then sends a voltage to a valve to open the pipe that heats the HW. When this valve opens it then sends a voltage to the boiler and pump which fire up to heat the water...

Surely its fancy words for an air conditioning unit mounted inside out. The cooling part is outside and hot part inside. Trouble is when the outside temperature is low, the unit has to work very hard to cool the outside (hence extract heat).