As has been pointed out by others, the crush gasket is loose on the threaded shaft, due to the threads no contiuing to the gasket contact surface, thus the gasket has no means of being centered when installed, increasing the likelihood of leakage. Otherwise, quality seems fine.

William M Verified Purchase

SAF-AIR OIL DRAIN VALVE S6250, 5/8"-18

Fit my C150 with O-200 perfectly. FYI, it did come with a copper gasket, so I did have to buy one to install it after all. Also come with anti-seize compound.

Darryl P Verified Purchase

SAF-AIR OIL DRAIN VALVE S6250, 5/8"-18

good fit

Jason B Verified Purchase

SAF-AIR OIL DRAIN VALVE S6250, 5/8"-18

*

Paul R Verified Purchase

SAF-AIR OIL DRAIN VALVE S6250, 5/8"-18

Installed, but untested at this point. Anticipate much easier oil change in the future for my Cessna 150.

Daniel L Verified Purchase

SAF-AIR OIL DRAIN VALVE S6250, 5/8"-18

Great failsafe quick drain although there can be installation problems on small continental engines, especially those with dented/distorted/repaired kidney tanks or from over tightening the QD such that the crush washer is completely flattened. When installed, some QDs fail to lock in the open position. Nothing is wrong with the QD itself, rather the top of the drain hits the oil suction tube so the QD cant be extended far enough up to lock open. Installing the QD with a new crush washer or an extra spacer washer generally provides enough clearance for the QD to operate as designed. One comment was about the QD threads missing and leaking at the gasket. Please note the QD has straight threads as does the kidney tank. Straight threads not intended or designed to make a seal. Sealing is face to face with a copper crush washer in between the QD shoulder and the oil tank shoulder. All the QD threads do is pull the two faces together crushing the washer and forming an oil tight seal. If the QDl is weeping oil at the crush gasket, check to see if the oil tank face is cracked or damaged. I hope this note helps anyone who is having installation problems.

My S6250 will not stay in up and locked open position. When lifted all the way up, the blue gnarled grip ring just turns around and around. So, I have to kneel there and hold the quick drain in the open position in order for it to drain. It’s awkward and uncomfortable when draining hot oil. Kind of defeats the purpose, doesn’t it? Previous owner installed it shortly before I bought the plane. Stopped working after three or four changes. Not sure I trust buying another one at those prices and no warranty.

Leaked after 10 hrs flight time! Putting the original plug back in. 😡

The 5/8-18 threaded SAF-AIR valve has a serious defect in the manufacture of the valve. The threaded portion of the valve does not extend to the installation gasket (AN900-10 copper crush washer) seal surface. The threads have been cut away in that area leaving the 1/8 inch section where the seal washer is undersize. Therefore there is nothing to hold the seal washer centered on the valve and the seal washer will or may move off center when the valve is torqued. Being off center leaves the seal washer in such a way that because it is off center there will be a seep oil leak result. Either the threads should not be removed from that area or the now reduced diameter of the valve body should be left in full 5/8 inch diameter so the seal washer will remain centered and do a proper job of sealing the installation. Regards, Lew Gage