JOHNSON'S PVC VEE-WIRE ENVIRONMENTAL WELL SCREENS WITH F-480 THREADED FLUSH JOINT THREADS. Johnson's exclusive Vee-Wire design continuous slot well screen gives you maximum open area and minimum plugging. Sonically welded PVC vertical support rods and V-shaped PVC wire wrap are thermally attached to the F-480 end fittings. Johnson's exclusive manufacturing process ( without the use of solvents ) makes these screens perfect for your environmentally sensitive monitoring applications. Each screen is individually cleaned and hermetically sealed in protective plastic bags to eliminate contamination. ASTM F-480 Flush Joint Threads with Buna-N o-rings provide leak proof joints. These screens will thread into out Titan brand threaded flush joint solid PVC monitoring casing as well as threading into stainless steel flush joint riser.