11 Water control valves, namely, stop valves for regulating water; throttle valves for throttling water flows, in particular for water distributors or for water distribution installations comprising water distributors; water control valves, namely, drainage valves for water distributors or for water distribution installations comprising water distributors; air valves, namely, ventilation valves for water distributors or for water distribution installations comprising water distributors; plumbing fitting, namely, ball valves for water distributors or for water distribution installations comprising water distributors; water control valves, namely, regulating valves for water regulation, in particular for water distributors or for water distribution installations comprising water distributors; thermostatic valves as parts of heating installations; thermostatic valves being parts of heating installations; water distributors, in particular heating circuit distributors or geothermal heating distributors, for sanitary installations, swimming pools, irrigation installations, geothermal installations and heating installations, having multiple water distributor segments, some or all water distributor segments thereof preferably being designed with a tubular housing or a housing in the form of a hollow body, in particular of plastic or glass fiber-reinforced plastic, being preinstalled or in the form of a kit, and replacement parts and fittings therefor; water distribution installations for heating installations and replacement parts and fitting therefor, namely, seals, valves, threaded rods, nuts, and compression fittings, comprising one or more water distributors of the aforesaid kind, a water pump and an electronic controller being an regulator for the water pump and for a regulating valve for regulating the water flow of the heating water and therefor for regulating the temperature of heating surfaces of at least one floor heating apparatus and/or at least one heating body, being preinstalled or in the form of a kit; water distributor segments and replacement parts and fitting therefor, namely, seals, valves, threaded rods, nuts, and compression fittings, for water distributors, in particular heating circuit distributors or brine-to-water geothermal heat distributors, for sanitary installations, swimming pools, irrigation installations, geothermal installations and heating installations, preferably with a tubular housing or a housing in the form of a hollow body, in particular of plastic or glass fiber-reinforced plastic