plumber Chelsea Plumbing - what a valve is?A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are czytaj dalej na tej stronie
boiler repairs Chelsea Gaskets - what are they?Gaskets are mechanical seals, usually formed like a ring and used for sealing of flange joints. In general, gaskets should not be reused. Various types of gaskets are available depending upon their czytaj tutaj więcej