The FVKENT is an all plastic float valve for controlling water levels in a reservoir. Body is ABS plastic with food grade neoprene gaskets and seals. It contains no metal parts. Mounting requires drilling a 5/8" hole about 1" above the desired water level. The FVKENTmounts like a bulkhead through this hole. It has 1/4" male NPT threads and comes fitted with an adapter compression fitting for 1/4" tubing connection. Adjustment for water level can be made on the side of the FVKENT over a range of about + or - 1 inch. This valve can handle pressures up to 90 psi.