Groco Pipe-to-hose 90 degree connectors are threaded with NPT(tapered) male pipe thread, and are for use with Groco Seacocks, Raw Water Strainers or with any product tapered female pipe thread. The use of Groco pipe-to-hose 90 degree connectors on products with NPS(straight) pipe thread is recommended only for low preasure applications, and then only with a generous applications of pipe PTFE Sealant or PTFE thread tape. All critical hose connections should be double clamped at both ends. Ideally, the hose clamp screws should be mounted opposite one another for maximum security. Use the highest quality AWAB hose clamp for longest life and best performance.