O-Ring 50×3 for the Hose Nozzle of the Filter Pump

O-ring 50×3: what it is for and when to replace it

The nozzle connects the hose to the pump. The ring is fitted around it and seals it. Over time it flattens and loses elasticity, and it easily tears during dismantling. Water then leaks from the connection or the pump sucks in air.

When to replace it

• water collects around the pump nozzle
• the pump sucks in air and runs noisily
• the ring is flattened, nicked or torn

Why choose an original part

The original Mountfield part is made for the specific model. That is why it fits without modification. Substitutes often differ by millimetres and the problem reappears. It is best to order the right item the first time.

Tips for long-lasting use

Before winterising, clean and check all connections. Store removed parts in a dry, dark place. Do not tighten plastic threads with power tools. This way small details last more seasons.

Regular maintenance is cheaper than an emergency repair. That is why keep spare gaskets and fasteners at hand. This way opening the pool in spring goes without surprises. The new part should not be combined with neighbouring parts that are already deformed.

How it is installed

1. Switch off the pump at the power supply and shut off the water.
2. Remove the hose and dismantle the nozzle.
3. Remove the old ring and clean the seat.
4. Fit the new ring evenly in the groove.
5. Reassemble the nozzle, connect the hose and check for leaks.

What You Get

You get an original Mountfield spare part with code DS2920141252, intended for the models listed above. Check the part code and the model of your equipment before ordering. If you are unsure, write to us and we will help you choose.

When replacing the ring, also check the 6×2 O-ring and the 14 mm mechanical seal. The strainer basket is also suitable for the maintenance, and all parts for filters and equipment are in one category.