Pool Plumbing Valves

plumbing
The system of pipes, tanks, fittings, and other apparatus required for the water supply, heating, and sanitation in a building
bathymetry: measuring the depths of the oceans
Used as a humorous euphemism for the excretory tracts and urinary system
(plumber) a craftsman who installs and repairs pipes and fixtures and appliances
The work of installing and maintaining such a system
utility consisting of the pipes and fixtures for the distribution of water or gas in a building and for the disposal of sewage

valves
(valve) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
(valve) device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
(valve) control consisting of a mechanical device for controlling the flow of a fluid
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow

pool
join or form a pool of people
Share (things) for the benefit of all those involved
an excavation that is (usually) filled with water
(of two or more people or organizations) Put (money or other assets) into a common fund
combine into a common fund; "We pooled resources"