Kenlok series (Grooved Type Fitting), by HKS, which uses the same grooving technique as that in Fire Services System. The joint tighten up with a coupling over a seal gasket to form a leak-proof connection. Fittings comply with AS 3688 Section 9. Both 304 and 316 grades are available in size from 54 - 200mm with Hong Kong Water Supplies Department (WSD) General Acceptance (GA) approved.