อัปโหลดแล้ว 4 ปี ก่อนหน้านี้
Easy to install, easy access for maintenance
• Vermin proof with large screened air vents
• Greater clearance for submersible pump cable
• Stainless steel hardware
• O-ring system ensures reliable watertight seal between well casing and retainer ring
• A second O-ring is used to seal cover and retainer ring, a positive compression seal is achieved by tightening 4 bolts
• Grounding terminal with bolt provided
• A well log is provided inside each cap to record installation data/specifications?
https://www.aquascience.net/boshart-industries-boshart-industries-7-aluminum-watertight-vermin-proof-well-cap
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