Description
Lasco 448015 (448-015) Schedule 40 PVC Cap – 1-1/2″ Female Pipe Thread (FPT/FNPT) – White
The Lasco 448015 is a Schedule 40 PVC female threaded cap designed to seal off the end of a 1-1/2″ male NPT fitting. It’s commonly used on pool/spa plumbing, irrigation manifolds, and general water systems where you need a removable, threaded closure for a port, clean-out, or future expansion point.
Key Features
- Part Number: 448015 (also shown as 448-015)
- Type: Threaded PVC cap
- Size: 1-1/2″
- Connection: Female NPT (FPT/FNPT)
- Material: Schedule 40 PVC
- Color: White
- Use: Seals a 1-1/2″ male threaded fitting or port
Common Uses
- Capping a threaded port on pool/spa plumbing manifolds
- Creating a removable clean-out or winterizing point
- Sealing a future takeoff on irrigation headers and equipment pads
Compatibility Notes
- Thread type: Designed for standard tapered NPT male threads (1-1/2″ MPT).
- Not a slip fitting: This cap does not glue onto pipe; it threads onto a male adapter or male threaded fitting.
- Do not over-tighten: PVC female threads can split if forced.
Related Products
- 1-1/2″ PVC Male Adapters (MPT x Slip) (convert a glued line to a threaded connection for this type of cap)
- 1-1/2″ PVC Threaded Plugs (MPT) (alternative way to close a female threaded port)
- PTFE Thread Tape (helps seal NPT threads)
- Thread Sealant for Plastic Threads (use a non-hardening sealant compatible with PVC)
- 1-1/2″ PVC Unions (adds serviceability near capped ports or equipment)
- 1-1/2″ PVC Ball Valves (control flow if the capped line will be activated later)
- Shop Lasco (browse more Lasco PVC fittings and plumbing parts)
Installation & Maintenance Tips
- Wrap male threads with PTFE tape (typically 2–4 wraps) and tighten snug by hand; use a wrench only for a small additional turn if needed.
- For plastic threads, avoid hard-setting pipe dope unless it’s specifically rated for PVC/CPVC and plastic threaded fittings.
- Never tighten under pressure—depressurize the line before adjusting threaded fittings.
- If you see seepage, remove the cap, clean threads, re-apply tape/sealant, and reinstall without over-tightening.
- Support nearby plumbing to reduce stress on threaded joints (pipe strain is a common cause of cracks and leaks).
