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I have always used a faucet wrench with the 'floppy' end. -Only occasionally find one impossible, in which case i carefully cut it off from the top with a disc grinder. If you do this, be extremely careful you don't touch the sink or tub with it.
Kohler brand faucet
Yes
yes
Yes, it can also cross through a two handled faucet. Both the hot and cold sides of the faucet must be on and the flow of water must be stopped or greatly reduced on the outlet side of the faucet. This can occur when a hose with a spray nozzle is attached to a laundry tub faucet with the faucet on and the spray nozzle off, or when a shower faucet is on but the shower spray head is off. When another cold water outlet in the system is turned on then the pressure on the cold side of the laundry tub or shower faucet in question could be lowered below the pressure on the hot side and hot water can flow into the cold water side. There are faucets which have integral check valves which prevent this from occurring. WWW.WOODBRIDGEPLUMBING.COM
A tub faucet acts as a shower and can be used to bath in the bath tub. It is a pressure valve which makes the flow of water through it constant and gives a nice shower.
Faucet side.
Most of them are in the wall. The other would be a deck mount, which is mounted to the fiberglass tub deck and uses a Roman Tub Faucet.
It depends on the make of the faucets.
A Roman tub faucet does have good water pressure because it is made to do that. How good this is depends on how other brands perform in this area.
By un surrounding it
Maybe the kitchen is further away and on smaller pipe.