BackStop H15 1/2" MNPT Cold Rolled Steel Pre-Pressurized Hydronic Heating Expansion Tank, 2.1 Gallon

The BackStop 1/2" MNPT Cold Rolled Steel Pre-Pressurized Hydronic Heating Expansion Tank, 2.1 Gallon (H15) is a expansion tanks product. H series hydronic expansion tank: residential diaphragm type pre-charged heating system tank. Absorbs the expansion of water in a hydronic (forced hot water) heating system, keeping system pressures below relief valve settings. Water is separated using heavy-duty diaphragm preventing tank corrosion and waterlogging. Manufactured by BackStop for residential and commercial plumbing repair and maintenance applications.