Check the listing for details. Irritec Perma-loc Tubing Reducing Tee Valve. Condition: New. Listed at 19.17 USD. About Drip Depot Perma-Loc Drip Irrigation Fittings:Perma-Loc fittings and adapters are heavy duty reusable connectors for all your connection needs. They are very easy to use and require no special tools. Perma-Loc fittings are available for both Tubing and Tape. The tubing connectors can be used on blank tubing as well as drip line.To Use: Simply twist the locking collar back towards the center of the fitting exposing the barb. Then push tubing or tape over barbed end. Next, hand-tighten locking nut over tubing or tape for a permanent secure fit.To Remove: Just loosen locking nut, pull tube off and re-use as needed.Perma-Loc fittings look similar to traditional flange and locking nut plumbing connections; however, in most cases, they work differently. Unlike a typical locking nut which comes off the fitting and slides over the tubing, a Perma-Loc locking nut is not removed from the fitting. This Perma-Loc reducing tee with valve is used to connect poly tubing of one size with another section of poly tubing of a different size, creating a three way junction with the added benefit of an inline ball valve. Use where on/off functionality is needed. Perma-Loc SeriesNominal SizeAcceptable Inside Tubing DiameterAcceptable Wall Thickness5003/8".510" to .580".035" to .055"6001/2".590" to .630".025" to .050"8003/4".790" to .845".045" to .065"10001"1.025" to 1.085".045" to .070"