Filter Replacement Part

AquaCrystal Sand Filter O-Ring

Replacement sealing component for compatible Illuminex AquaCrystal sand filters.

Confirm your AquaCrystal filter model, seal location, and replacement-part number before ordering.

Part: LU-ORSF

Product image pendingPart LU-ORSF

Sand Filter Sealing Component

Sand Filter O-Ring

Confirm the exact installation location before ordering

Part: LU-ORSF

Replacement O-ring for the approved sealing location on compatible AquaCrystal sand-filter assemblies. The exact installation location (valve-to-tank, union, drain, or other) must be confirmed from the spec sheet before ordering.

In Stock

Available for compatible AquaCrystal sand-filter service.

Sealing Component

Replacement seal for the approved AquaCrystal filter connection.

Service Replacement

Designed for maintenance of the compatible sand-filter assembly.

Model-Specific Fit

Confirm the filter model and part number before ordering.

Filter Seal

Helps Seal the Approved Filter Connection

This O-ring provides the sealing interface at its approved AquaCrystal installation location. The exact location is not specified in the current product record — confirm it from the spec sheet before ordering.

A single O-ring seals one specific connection. It does not seal the entire filter assembly.

This O-Ring Is a Seal — Not a Leak Fix or Performance Part

✕Not guaranteed to stop all filter leaks

✕Not a universal fit for all sand filters

✕Not a pressure-control device

✕Not a flow-improvement component

✕Not a filtration-improvement part

✕Not a lifetime seal

A damaged or incorrectly installed sealing component may contribute to leakage at its specific connection. The actual cause of a leak must be diagnosed correctly.

Compatible AquaCrystal Filters

Exact AquaCrystal model compatibility is not listed in the current product record. Do not assume this O-ring fits all six AquaCrystal models — O-rings that look similar may differ in inside diameter, outside diameter, cross-section, material, or groove geometry.

Confirm Compatibility Before Ordering

Contact our team with your AquaCrystal filter model and the seal location being serviced. We'll confirm whether this O-ring (LU-ORSF) is the correct replacement for your filter.

Valve size (1.5″ or 2″ multiport valve) does not automatically determine O-ring compatibility. If this O-ring belongs to the multiport-valve assembly, compatibility must be verified independently for each valve size.

Identify the Seal Location

The exact installation location of this O-ring is not specified in the current product record. Confirm which of the following matches your filter before ordering.

Option A

Valve / Tank Connection

Multiport Valve

O-Ring

Filter Tank Neck

Option B

Union Connection

Multiport Valve Port

Union O-Ring

Plumbing Connection

Option C

Drain Connection

Lower Filter Tank

Drain Opening

O-Ring + Drain Plug

Conceptual location options only — the exact location for LU-ORSF must be confirmed from the spec sheet or approved AquaCrystal parts diagram before ordering.

O-Ring Details

Only confirmed information is shown. Dimensions, material, and cross-section are not published unless verified in the product record or spec sheet.

Part Number

LU-ORSF

Application

Sand-filter sealing component (exact location to be confirmed from spec sheet)

Compatible Models

Not specified in current record — confirm before ordering

Package Quantity

1 × O-Ring (confirm from spec sheet)

Inside diameter, outside diameter, cross-section thickness, material (EPDM, Buna-N, Viton, silicone), durometer, temperature rating, and pressure rating are not published unless confirmed. Material is not inferred from O-ring color.

Installation & Lubrication

Follow the current AquaCrystal service instructions when installing or servicing the O-ring.

Do not assume pump O-ring lubrication instructions apply to this sand-filter seal. Only use a lubricant if the current AquaCrystal or valve service documentation specifically identifies the approved lubricant type and installation procedure.

When Should the O-Ring Be Inspected?

Visible Damage

Inspect the O-ring for visible cuts, cracking, flattening or deformation.

During Service

Inspect the seal and its mating surfaces whenever the approved connection is opened for service.

Replace When Necessary

Replace the O-ring when the approved service documentation identifies the existing seal as damaged or no longer serviceable.

Depressurize Before Service

Turn off the circulation pump and fully relieve pressure from the filtration system before opening or servicing any sand-filter connection.

Follow the current AquaCrystal filter and multiport-valve instructions for the specific service procedure.

Never remove the multiport valve while pressurized.

Never loosen filter fittings while the pump is running.

Never remove a drain component before pressure is relieved.

Do not open a filter connection to relieve pressure.

What's Included

Package contents come from the actual product record. No gasket, lubricant, valve, clamp, or hardware is shown unless actually included.

1 × Sand Filter O-Ring

Part: LU-ORSF

Exact package quantity is confirmed from the spec sheet. No additional seals, tools, or hardware are assumed.

Confirm the Correct O-Ring

Find Your Filter Model

Locate the AquaCrystal model number on the filter label.

Identify the Seal Location

Confirm where the O-ring is installed on the filter assembly.

Match the Part Number

Confirm the approved replacement-part number before ordering.

Request This Part

Tell us about your AquaCrystal filter and the seal location being serviced. We'll confirm whether LU-ORSF is the correct O-ring and check availability. Your request automatically references this product.