4" Innoflue SW Termination Tee

The ISTT0420 from Centrotherm is a Termination Tee for 4” Innoflue SW pipes. This tee is used where termination is exposed to heavy wind, rain or prone to freezing. Made from UV-stabilized polypropylene, designed for use with 4" Innoflue SW pipe and fittings. For best performance, use in combination with bird screen(s) (part# IASPP04). Overall length is 29.8".


  • Innoflue SW (Single Wall) is the only polymer vent system on the market listed to UL 1738;
  • Accepted and approved by over 50 North Amercian manufacturers of boilers, water heaters and furnaces;
  • Suitable for natural gas, propane and fuel-oil condensing and non-condensing (flue temp. below 248°F) appliances;
  • All parts (pipe, fittings, etc. - both black and grey) are UV resistant and suitable for indoor or outdoor installation;
  • Requires no primer/glue and does not leach chloride like PVC & CPVC;
  • Costs less and is faster and easier to install than stainless steel venting, no special tools needed, zero clearance to combustibles;
  • Industry-leading 2mm wall thickness;
  • Built-in gasket allows for adhesive-free installation which can be adjusted at any time;
  • May be installed through a wall, chimney, chase or between joists;
  • Lightweight, requires minimal support;
  • Made in the USA from environmentally-friendly PolyPropylene (PP).
Product Type
Wall Termination
Vent Type
Single Wall

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4" Innoflue SW Termination Tee

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  • 4" Innoflue SW Termination Tee QR Code
  • Brand: Centrotherm
  • Model: ISTT0420
  • MPN: ISTT0420
  • Availability: 1
  • $ 86.95

Tags: Vent Pipes, Heating, Heating Supplies, Condensing Boilers, Heating and Cooling