HTH 52015 Shock Treatment Bag, 13.3 Ounce Clearance Anti-Siphon valves should always be

Anti-Siphon valves should always be installed at least 6" above the highest head on the valve line

Thermoplastic top and body are virtually unbreakable

Siding/Decking

Absolute barometric pressure with 12 hour history graph (inHg or hPa)

tinted glasses and hard shell carrying case

HTH 52015 Shock Treatment Bag, 13.3 Ounce Clearance Anti-Siphon valves should always beShock treat your pool at least once a week to kill unwanted bacteria and algae. Shocking gives your pool the boost of chlorine it needs to keep the water clean and clear. Highlights: Size: 13. 3 Ounce Effective, multi purpose product that sanitizes, clarifies, helps prevent algae in your pool, convenient Easy to use Won't over stabilize your pool For crystal clear pool water Follow our HTH 4 step pool care program: step 1: test & adjust pool water