Videos January 9, 2019Fittings and ValvesPeerless Commonly asked questions. What approvals does DK-LOK valves and fitting have?How big is the DK-LOK range?Can a Diaphragm Seal be repaired?When do I use a metal hose as opposed to an expansion joint? DKAPPROVE What approvals does DK-LOK have? A great message from our friends at DK-LOK Canada dkrangeHow big is the DK-LOK line up? From our friends at DK-LOK Canada sealCan a diaphragm seal be repaired? Diaphragm Seal Repair When to use metal hose vs. an expansion joint?