These are very difficult to find plumbing fittings used in koi ponds. They are schedule 40 PVC for pressure rated environments. Grey PVC double union with ball valve. They are slip connections for "gluing" to pipe. BRAND NEW Price each. We have 6. Curbside Pickup available. Note: these are being sold elsewhere in Ottawa for over $300 ea. Reason for selling: we ordered more than we are using.