Designed to economically handle relatively high flows in a compact package this is a versatile heat exchanger. Utilizing a straight self cleaning corrugated tube are OEM friendly, and manufactured to meet ASME codes. 316L stainless steel ASME rating of 250 psi @ 406F. Female NPT connections. Straight corrugated tubes non-removable parts. Pool capacity 6,000 Gal, 6.14 in. width, 3.15 diameter, 15.83 in. long, 1 1/2 NPTF x 3/4 NPT