70ish psi if your on city water, well waters gana be less
turn up the water pressure
standard size for bathroom sink drain is 1-1/4 standard size for kitchen sink drain is 1-1/2
check that valves are fully open
Check the screen and aerator in the spout for debris that may block the openings
When you took the aerator off the spout, did you run the water to see if it was full pressure? If it isn't full pressure with the aerator off, sometimes stuff gets plugged in the spout itself. Sometimes you can stick a wire down it and get rid of it.
It could. An average single tub kitchen sink is about 25 litre.
20
put water in it
take your screen off the faucet. if this doesnt work, check your lines for breaks. good luck
PRESSURE INCREASES are normally effected by raising the height of water supply to increase the downflow. If this is not possible, increase the bore of the supply pipe from your tank.
The water pump.
Tap water sink water well water ect....