Astral Filter O-Ring$1211
Quick overview
- Astral replacement The o-ring specified for these Astral filter bodies, part 721R1820060.
- Measured size 7.5 inch inside diameter, so you can check it against the ring you are pulling out.
- Persius 1800 series Listed for the Astral Persius 1800 top mount sand filter.
- Cantabric 3000 series Also listed for Cantabric sand 3000 series filters in both top mount and side mount forms.
- Stops the seep A flattened or cracked o-ring is the usual reason a filter weeps at the seam every time the pump starts.
- Lubricate on fitting A silicone based o-ring lubricant helps the ring seat evenly and makes the next service easier.
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Product details
This is the Astral replacement filter o-ring, part 721R1820060, with a 7.5 inch inside diameter. It seals the filter housing on the models it is listed for.
Where it goes
Astral lists it for the Persius 1800 series top mount sand filter and for the Cantabric sand 3000 series in both top mount and side mount configurations. Before ordering, measure the ring you are pulling out across the inside opening and compare it to the 7.5 inch figure, since filter o-rings that look alike often are not.
Fitting it
Clean the groove and the sealing face before the new ring goes in, and use a silicone based o-ring lubricant. That helps the ring seat evenly instead of rolling as the housing closes, and it keeps the ring from bonding to the housing so the next service is straightforward.
| Brand | Astral |
|---|---|
| Manufacturer part number | 721R1820060 |
| Type | Filter o-ring |
| Inside diameter | 7.5" |
| Part type | Pool filter part |
| Fits | Astral Persius 1800 series, Astral Cantabric sand 3000 series top mount and side mount |
| Shipping weight | 0.05 lb |
| Ships | Parcel |
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