Brass Non-Return Check Valve with Internal Thread and External Thread for Garden Pump Toilet Fountain Heater Water System

All Copper One Way Check Valve:Made of 59# copper, with universal 4-point internal thread inlet and externally threaded outlet, suitable for water pipes, showerheads and other drains, the set of two meets double way check requirements. Precise backflow protection The integrated precision valve core ensures even water flow and instant closure in the opposite direction, completely eliminating sewage backflow and ensuring the safety of water supply in the pipelines. Durable All-Copper Material No.59 thick brass, rust-proof, corrosion-resistant, high pressure resistant and anti-aging, with precise thread engagement and sealing ring, ensuring perfect sealing after installation. Quick Tool-Free Installation Standard 4-point specification, compatible with common household pipes, hand tightening, no professional tools are required, making maintenance and modification easier. VERSATILE AND SUITABLE FOR MULTIPLE SITUATIONS - Compatible with water heaters, water purifiers, shower heads, garden hoses, etc., it can be used in kitchens, bathrooms and outdoor gardens, making it an ideal accessory for plumbing repairs.