18 mm U‑Seal Plunger Kit – Part 8.725‑360.0 (Kärcher / Landa / Hotsy)

Maintain peak pump performance with the 8.725‑360.0 U‑Seal Kit, featuring advanced nested U-seals engineered to resist pressure spikes and deliver outstanding durability. This kit is essential for 18 mm piston repair in popular pressure washer pumps, providing longer seal life and stronger support—especially during rapid trigger actions.

Kit Includes:

• 3 High-pressure U-seals

• 3 Low-pressure U-seals

• 6 Teflon support rings

• 6 Seal backing rings

• 3 O-rings

Note: Brass pressure and intermediate rings are not included; a full kit is recommended if those parts show wear.

Specifications:

• Part Number: 8.725‑360.0

• Seal Type: Nested U-seal technology for enhanced durability

• Fits Pumps:

  • Landa: LM4035, LM6035 series

  • Kärcher: KM4035, KM6035 series

  • Hotsy: HC205AL, HC240A, HC340R, HM4035 series

  • Legacy: GM4035, GM6035 series