Review on Biltek NPTC QCMHL 1P Refrigerant CouplerHigh Adjustable by Joseph Anderson

If you look at the photo you can see the Schrader valve stem that I removed from my low pressure fitting on my air conditioner. The spring that closes the valve is broken. It was damaged when the Biltek NPTC-QCMHL-1P Low Pressure Adapter pushed my schrader valve TOO HARD. The result is a slow leak from your air conditioning system that you can't identify or find. The fault is that the Biltek valve is machined to push the valve stem beyond its design specification. (I tried to notify the manufacturer and also notified Revain.) But I came back later to find the same items were still on sale. Save yourself the trouble and AVOID THIS ARTICLE.