Swimming Pool Strainer Housings have fiberglass reinforced plastic construction, pressure tested to 50 PSI. Features include : Isophthalic fiberglass resin, stainless steel lid bolts, transparent clear swing open acrylic lid, 316 stainless steel v-wire basket with 3/16” square welded openings standard, and large open areas. Many alternate basket materials and opening sizes are available. For seawater service (with salt added for chlorine generation or aquariums as opposed to pool water) we suggest duplex stainless steel (2205 alloy) or Hastelloy. Strainers are supplied with flanged connections drilled to 150 lb. ANSI standard. Reducing Strainers incorporate “true length” reducer dimensions to ensure proper transition velocity, which, if shorter, could be detrimental to the pump.