Extrol expansion tanks accept expanded fluid in closed loop hydronic systems to control pressure build-up, improve comfort and help reduce energy costs. Nearly seven decades after inventing the first diaphragm expansion tank, Amtrol's lineup now includes specialty models engineered for modern, high efficiency systems. None of it would have been possible without Extrol - the one that started it all.

• Strongest tank design featuring deep drawn steel and multi-dome construction
• Thickest diaphragm - heavy-duty butyl/EPDM
• Projection welded air stem to help eliminate leaks
• Patent pending InSight service indicator cap
• 12 psig factory precharge
• Accepts expanded water as system temperature rises and returns it to the system as the temperature drops
• High strength steel shell
• In-line mounting adds convenience and space savings
• Welded steel system connection
• Urethane top coat finish
• Suitable for propylene glycol applications with mixtures up to 50%
• 0.5 maximum acceptance factor
• Made in USA
• 7-years limited warranty

Standards/Certifications: PHCC, ISO 9001:2008 standard

Applications: For use in closed, hydronic heating systems to control pressure build-up

• Catalog https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS2157_Cat.pdf
• Installation Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS2157_Instal.pdf
• Specification Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS2157_Spec.pdf