DuraVent 3PVP-WT PelletVent Pro Wall Thimble - 3" Brand_Flame Boss Use every time you add

Use every time you add water to your hot tub or spa

a 1-1/2 inch male pipe thread bottom that screws in for a tight seal

so square footage alone won't tell you which you need

Circulate spa or hot tub water for 15 to 20 minutes

DuraVent 3PVP-WT PelletVent Pro Wall Thimble - 3" Brand_Flame Boss Use every time you addDuraVent 3PVP WT PelletVent Pro Wall Thimble 3" Overview DuraVent PelletVent Pro Wall Thimble features twist lock construction in both 3" and 4" diameters. Listed at 1" clearance to combustibles in the USA. This PelletVent Pro can be used in both vertical and horizontal installations. Stainless Steel welded seam inner wall, combined with galvalume welded seam outer wall. Whats in the Box 1 x DuraVent 3PVP WT PelletVent Pro Wall Thimble 3"