Kilz Original Oil-Based Interior Primer Sealer Stainblocker, White, 1 Gal. Gas Fittings & Connectors In-Line valves will not prevent

In-Line valves will not prevent back flow on their own: they need the help of a back flow prevention device

Seals out air

All covers are keyed alike

Full of essential nutrients

Kilz Original Oil-Based Interior Primer Sealer Stainblocker, White, 1 Gal. Gas Fittings & Connectors In-Line valves will not preventA powerful stain blocking formula that blocks most severe stains including water, smoke, tannin, ink, pencil, felt marker, grease and also seals pet, food and smoke odors. Original may be top coated with latex or oil based paint. Blocks heavy interior stains. Seals smoke, pet and food odors. Seals porous surfaces for uniform finish. Stains: water, smoke, tannin, pencil, felt marker, grease. Odors: pet, food and smoke. Use on: wood, drywall, plaster,