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The Watts 07F is an epoxy coated cast iron single check valve. Produced in sizes 4 - 10", the 07F is no longer in production and was replaced with the SS07F. Although discontinued, repair parts are still available.
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The Watts SS07F is a stainless steel single check valve. Produced in sizes 4 - 10", the SS07F is currently in production and replaced the older cast iron 07F.
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The 8" Watts 770 Double Check Assembly was produced from 1993-1997. The body is a two cover, epoxy coated ductile iron construction. The check assemblies are stainless steel toggle linkage type. They use a vulcanized clapper plate. Check springs are contained when the cover is removed. Spring tension must be removed to repair the device. The device has replacable bronze seats, but a seat removal tool is required.
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The 8" Watts 770DCDA Double Check Detector Assembly was produced from 1993-1997. The body is a two cover, epoxy coated ductile iron construction. The check assemblies are stainless steel toggle linkage type. They use a vulcanized clapper plate. Check springs are contained when the cover is removed. Spring tension must be removed to repair the device. The device has replacable bronze seats, but a seat removal tool is required. The bypass device was a 3/4" Watts 007M1
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The 8" Watts 772 Double Check Assembly was produced from 1993-1997. Very similar to the 770, with exception to the shutoffs. The 772 uses a special sgutoff that are not standard. Two different sizes on the flanges make it unique. The body is a two cover, epoxy coated ductile iron construction. The check assemblies are stainless steel toggle linkage type. They use a vulcanized clapper plate. Check springs are contained when the cover is removed. Spring tension must be removed to repair the device. The device has replacable bronze seats, but a seat removal tool is required.
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The 8" Watts 772DCDA Double Check Detector Assembly was produced from 1993-1997. Very similar to the 770, with exception to the shutoffs. The 772 uses a special shutoff that are not standard. Two different sizes on the flanges make it unique. The body is a two cover, epoxy coated ductile iron construction. The check assemblies are stainless steel toggle linkage type. They use a vulcanized clapper plate. Check springs are contained when the cover is removed. Spring tension must be removed to repair the device. The device has replacable bronze seats, but a seat removal tool is required. The bypass device was a 3/4" Watts 007M1
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The 8" Watts 775 Double Check Assembly was produced from 1998-2003. The body was made of stainless steel. Single cover with modular check assemblies. Check modules thread into body. No special tools are required for servicing.
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The 8" Watts 775DCDA Double Check Detector Assembly was produced from 2000-2003. The body was made of stainless steel. Single cover with modular check assemblies. Check modules thread into body. Bypass device shall be a 3/4" Watts 775 or 3/4" Watts 007M3. No special tools are required for servicing.
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