If your central heating is functioning perfectly but there is no hot water coming from your shower or taps, it is likely an issue with the diverter valve. If you are experiencing this problem then the diverter valve may be faulty, or it may be stuck in the central heating position.Just so, why is my tap not working?
The ball valve may be stuck, which will have caused the cistern to empty. If this is the case, sharply move the float arm to dislodge the valve, and then give it a proper clean. The cold water cistern should fill up and your taps should start working again. Is there an air-lock in your plumbing?
Furthermore, why does my hot water tap runs slow? If your hot water pressure is slow in just one fixture, you'll want to check to make sure the hot water valve is turned all the way on. But if you've found that your hot water pressure is weak in all of your home's appliances, it's most likely due to sediment build-up in your water heater.
Just so, how do you fix an airlock on a hot tap?
The first way to clear an airlock, involves attaching a hose pipe to the hot and cold taps at a sink in your home and turning the cold tap on so that the water flows through the hose pipe, into the hot water tap, removing the air.
How do you fix a loose head on a tap?
- -Tap Back Nut Box Spanner – 27mm & 32mm.
- Put a towel under as there will be water left in the system.
- Slowly undo the flex pipes nuts.
- Step 3: Use the Tap Back Nut Box Spanner – 27mm & 32mm to tighten back the tap nut making sure you hold the tap in the same time.
How do you loosen a tap valve?
Try tapping the body of the valve with the handle of a wench or adjustable spanner while you turn the valve will do the job. Warm up the body of the valve with a hair dryer, or (carefully) with a blowtorch might expand the body of the valve enough to allow the gate (or other moving parts) to move more freely.Why do I suddenly have no water?
If you suddenly have no water pressure in the entire house, that could be caused by a glitch in the water supply system — perhaps a broken water main several blocks away or by your own pressure regulator. If the pressure doesn't change at all no matter how much you turn the nut, the problem is on the supply side.Why is there no water coming out of my bathroom sink?
It's a common problem: the water pressure in your home is fine, but when you turn on the bathroom faucet, it barely trickles out. The small filter on the faucet is clogged. This small screen is typically installed on bathroom faucets to prevent the water from splashing up when it hits the sink. 
