What are common problems with pebble tech pools?

Answer 1

COMMON PROBLEMS WITH AND AROUND PEBBLE TECH POOLS Hydrostatic pressure is a major concern to technicians. Excessive hydrostatic pressure severely damages or destroys in-ground pools each season. When the pool is emptied for painting, re-coating or other work and left for a period of time, the existing under-ground water pressure or water soaked soil presses so hard upon the empty shell that it literally floats out of the ground. Even a slight change in hydrostatic pressure may move the pool enough to cause cracking, especially on deck/shell structures in expansive soils. Type situations causing floatation of in-ground pools/spas include: A pool built flush with the ground in a fairly depressed area with poor drainage, particularly in clay soils. A pool build on flat ground adjoining a hillside with the pool itself acting as a dam for underground water. A pool lying in soil that expands when soaked or even moist. A pool build in a high water table. To prevent pool flotation, look for an open any hydrostatic relief valves that might have been installed by the pool builder. This will allow ground water to seep into the pool Some pools are fitted with a manual type of hydrostatic relief plug, similar to a vacuum fitting flush with the floor of the pool. The automatic type is frequently found in the bottom of the main drain and is either spring loaded or made with a simple vertical check valve. Be sure to open the manual hydrostatic relief plug when a pool is drained. Be sure to check that an automatic hydrostatic relief valve is working properly when a pool is drained. A malfunction is exceedingly costly. When these valves re malfunctioning or non-existent, it is necessary to add new hydrostats or a well point system. Well point systems may require a professional to do this. These new points remain permanently on the pool site for future use. Regular pool pumps work well to relieve this subterranean pressure. These points should extend 12 inches under the pool. The pumps are kept running even with pumping at a trickle. The pool can then be drained.