Lawn treatment apparatus for an underground sprinkler system

摘要

A lawn treatment apparatus (10) for an underground sprinkler system (12) on a lawn (14). The system (12) is fabricated out of a durable plastic material (15) and includes an inlet pipe (16) with a water control valve (18) connected to an outlet pipe (20) with an anti-siphon valve assembly (22), having an anti-siphon valve housing (24) with an externally threaded mouth (26) and an internally threaded anti-siphon valve cap (28) carrying an anti-siphon valve (30). The apparatus (10) comprises a body member (32) having an open bottom end (34) and an open top end (36). A structure (38) is for securing the open bottom end (34) of the body member (32) to the externally threaded mouth (26) on the anti-siphon valve housing (24). A facility (40) is disposed in the body member (32) for mixing a chemical deposited within the body member (32) with a water flow traveling from the inlet pipe (16) into the anti-siphon valve assembly (22) and out through the outlet pipe (20) in the underground sprinkler system (12), so that the chemical can be sprayed onto the lawn (14). An element (42) is for retaining the open top end (36) of the body member (32) to the internally threaded anti-siphon valve cap (28), so that the anti-siphon valve (30) can make contact with the chemical mixing facility (40), to prevent the water with the chemical from backing up into the water supply.