Single Tap Lead-Free Check Valves - 500 Series

 No-spin poppet - One 1/8" NPT tapping on inlet side - No spin poppet design for demanding installations - Seal backed by 300 series stainless steel washer - Stainless steel lock nut and bolt to ensure reliability - Stainless steel spring does not allow poppet to spin - Zinc plates body outside and inside for better corrosion resistance - Heavier wall thickness than competitors - Merrill 500 series check valves are rated for a maximum weight of 1,000lbs. in tension (down pull)