Universal Sand Filter Drain Plug
Replacement lower drain component for compatible sand-filter tanks.
Verify your filter model and drain connection before ordering.
Sand Filter Drain Plug
Replacement drain component for the lower tank drain location on compatible sand filters.
Filter Drain Component
Replacement component for compatible sand-filter lower drain connections.
Service & Winterization
Provides access for approved draining during filter maintenance and seasonal service.
Verify Compatibility
Match the filter model and approved drain connection before ordering.
Closes the Sand Filter Drain
The drain plug closes the designated lower drain opening on a compatible sand-filter tank during normal operation.
When draining is required for approved maintenance or winterization, the drain component can be serviced according to the filter manufacturer's instructions.
This Drain Plug Is a Drain Component — Not a Pressure or Flow Device
What Does "Universal" Mean?
This drain plug is compatible with the specific filter models listed below. Compatibility is determined by the drain connection and approved replacement-part specification — not simply by filter type.
"Universal" does not mean "fits all sand filters." It refers to compatibility with the specific AquaCrystal models listed below. Do not assume this drain plug fits every sand-filter brand or tank size.
Compatible AquaCrystal Filters
Verified from the backend product record: "Drain Plug for LU-SF19 / LU-SF22 / LU-SF24 / LU-SF24II" — designed to fit 19″, 22″, and 24″ AquaCrystal sand-filter tanks.
Compatibility for AquaCrystal LU-SF31 (31-Inch) and LU-SF36 (36-Inch) is not confirmed for this drain plug. If you have one of those models, contact us before ordering.
Non-Illuminex filter compatibility is not published without exact approved model-level documentation. Do not assume this drain plug fits other manufacturers' filters based on the word "Universal."
Where It Fits
Conceptual location of the drain plug on a compatible sand filter.
Conceptual product-location visual — refer to the current filter manual and parts diagram for exact installation details.
Which Drain Plug Do I Need?
This Universal Drain Plug and the AquaCrystal Hex Drain Plug are different physical parts with different SKUs. They are not interchangeable.
Universal Sand Filter Drain Plug
For the specific compatible AquaCrystal drain connections listed on this page (LU-SF19, LU-SF22, LU-SF24, LU-SF24II).
AquaCrystal Hex Drain Plug
For compatible AquaCrystal models using the approved hex-style drain component.
View AquaCrystal Hex Drain PlugThese two drain plugs are not interchangeable. Confirm which drain component your filter uses before ordering.
Drain Plug Details
Only confirmed information is shown. Thread size, thread type, plug diameter, and seal design are not published unless verified in the product record.
Thread specifications (NPT, NPSM, BSP, metric, diameter, pitch) are not published unless confirmed for this exact drain plug. Filter valve size and inlet/outlet size are unrelated to the drain-plug thread.
Designed for Filter Draining & Service
The lower drain provides access for removing water from a compatible sand-filter tank during approved maintenance and winterization procedures.
Removing the drain plug does not automatically remove sand media, internal laterals, standpipe, or the multiport valve. Follow the current filter manual for approved draining and winterization procedures.
Depressurize Before Service
Turn off the circulation pump and fully relieve pressure from the filtration system before removing or servicing the drain plug.
Follow the service instructions for the specific filter model.
Never remove the plug while the pump is running.
Never loosen it while the tank is pressurized.
Do not use the drain plug as the normal pressure-relief device.
When Should the Drain Plug Be Inspected?
Visible Damage
Inspect the plug for visible cracking, deformation or damage.
Seal Condition
Inspect the approved sealing component and mating drain surface during service.
Poor Drain Seal
If the connection does not seal correctly, inspect the plug, seal and drain opening according to the filter service instructions.
Replace When Necessary
Use the correct compatible replacement part when the existing drain component is damaged or no longer serviceable.
What's Included
Package contents come from the actual product record. No O-ring, gasket, washer, adapter, or tool is shown unless actually included.
O-ring or gasket inclusion is not assumed — if a seal is sold separately, it appears under Related Sand Filter Replacement Parts.
Confirm the Correct Drain Plug
Find Your Filter Model
Locate the filter manufacturer and model number.
Check the Drain Connection
Identify the lower tank drain and existing drain-plug style.
Confirm Compatibility
Match the filter model with the approved compatibility list before ordering.
Request This Part
Tell us about your filter and we'll confirm whether this universal drain plug is compatible and available. Your request automatically references this product.
