Septic Tanks - Extension piece
A extension piece—commonly referred to as a riser or manhole extension—is a durable plastic cylinder that attaches to a septic tank access opening to bring the…
Septic Tanks - Extension piece
—A extension piece—commonly referred to as a riser or manhole extension—is a durable plastic cylinder that attaches to a septic tank access opening to bring the lid level with or just above the ground.
Key highlights
- A extension piece—commonly referred to as a riser or manhole extension—is a durable plastic cylinder that attaches to a septic tank access opening to bring the lid level with or just above the ground
Sizes & technical specifications
3 size options available.
| Capacity |
|---|
| 150 mm Long |
| 300 mm Long |
| 500 mm Long |
Built to carry the load — for years
Rust & corrosion free
PVC won't rust or corrode, so it handles hard water and local weather without weakening.
Pressure-rated grades
Multiple pressure classes so you get the right strength for depth, flow and load.
Leak-proof joints
Precise dimensions and fittings make clean, leak-free connections on every line.
Underground ready
Resists soil moisture and stays stable underground when laid at the correct depth.
Need the right pipe for your project?
Tell us the size and quantity — we'll get back the same working day.