Marquis OEM 50 Sq. Ft. Spa Filter – 20690

Genuine Marquis OEM 50-Square-Foot Spa Filter

Maintain clean water and proper circulation with the genuine Marquis 20690 replacement filter. This OEM cartridge is designed for compatible Marquis ConstantClean filtration systems and provides approximately 50 square feet of pleated filtration media.

The 20690 measures approximately 16 inches long by 5⅛ inches in diameter. It features a convenient top handle and a 2-inch male threaded bottom connection for secure installation in the spa’s filter housing.

This is a genuine OEM Marquis replacement filter—not an aftermarket substitute.

Package includes one Marquis 20690 filter cartridge. Some compatible spas use more than one filter, so confirm the quantity required before ordering.

🔹 Key Benefits

• Genuine OEM Marquis replacement filter
• Approximately 50 square feet of pleated filtration media
• Helps capture dirt, oils, debris and other contaminants
• Supports proper water flow and filtration performance
• Designed for compatible Marquis ConstantClean systems
• Closed top with an integrated removal handle
• Male threaded bottom connection for secure installation
• Washable and reusable with proper maintenance
• Made in the USA
• Direct replacement for Marquis part number 20690

🔍 Compatible Marquis Hot Tubs

The Marquis 20690 is used in compatible filtration systems found in select versions of the following Marquis collections and models:

• Select Marquis Celebrity models from approximately 2018 and newer
• Select Marquis Celebrity Elite models from approximately 2018 and newer
• Select Marquis Elite models from approximately 2020 and newer
• Select Marquis Crown Collection models from approximately 2021 and newer
• Select Marquis V150P swim spas from approximately 2019 and newer
• Select Marquis V150W swim spas from approximately 2019 and newer

Select Marquis Elite Applications

• Marquis Broadway Elite
• Marquis Monaco Elite
• Marquis Hollywood Elite
• Marquis Vegas Elite
• Marquis Woodstock Elite

The Marquis Nashville and Nashville Elite generally use a different, smaller-capacity filter. Do not order the 20690 for a Nashville based solely on the collection name.

Marquis has changed filter configurations within certain collections, models and production years. Do not order by model name alone. Confirm the 20690 number, dimensions, handle and threaded connection before purchasing.

📏 Confirm Your Filter Before Ordering

Your current filter should match the following characteristics:

• Marquis part number 20690
• Approximately 50 square feet of filtration media
• Approximately 15⅞ to 16 inches long
• Approximately 5⅛ to 5¼ inches in outside diameter
• Closed top with an integrated bar-style handle
• Approximately 2-inch male threaded bottom connection
• Same end-cap shape and mounting configuration

The Marquis 20690 is also commonly cross-referenced with the Unicel 5CH-512 replacement configuration. This listing is for the genuine Marquis OEM cartridge.

If you are uncertain, contact Southern Leisure with pictures of the top and bottom of your existing filter, its measurements, your spa model and its production year before ordering.

📋 How to Replace

1. Turn off power to the spa at the breaker.
2. Remove the filter cover or skimmer-access assembly.
3. Use the integrated handle to carefully unscrew the existing filter.
4. Remove loose debris from the filter compartment.
5. Remove all protective packaging from the new cartridge.
6. Inspect the handle, end caps and threaded connection.
7. Position the filter over the matching connection in the housing.
8. Thread the filter gently into place by hand.
9. Do not force, cross-thread or overtighten the cartridge.
10. Install any additional cartridge required by your filtration system.
11. Reinstall the filter cover or skimmer assembly.
12. Restore power and confirm normal water circulation.

💬 Southern Leisure Says

The Marquis 20690 looks similar to several other threaded spa filters, but the cartridge length and connection must match. Confirm all three identification points—the 20690 part number, approximately 16-inch length and threaded bottom—before ordering.

Some Marquis filtration systems use more than one cartridge. This listing includes one filter, so inspect your spa’s filter compartment before choosing the order quantity.

🧼 Care & Maintenance

• Inspect and rinse the filter regularly during normal spa use.
• Carefully rinse between each pleat using a garden hose.
• Work from the top of the cartridge toward the bottom.
• Rotate the filter while rinsing to clean the entire cartridge.
• Clean more frequently during periods of heavy use.
• Periodically use a dedicated spa-cartridge cleaner to remove oils and residue.
• Follow the cleaner’s directions and rinse the filter thoroughly.
• Do not use a pressure washer, stiff brush or sharp cleaning tool.
• Maintain balanced water chemistry to support filtration performance.
• Replace the cartridge if its pleats become torn, collapsed or permanently restricted.
• If your spa uses multiple filters, inspect and maintain them together.

📌 Product Quick Facts

• Brand: Marquis
• Product: OEM pleated spa filter cartridge
• Manufacturer number: 20690
• Common aftermarket cross-reference: Unicel 5CH-512
• Filtration area: Approximately 50 sq. ft.
• Length: Approximately 15⅞ to 16 inches
• Outside diameter: Approximately 5⅛ to 5¼ inches
• Top: Closed with integrated handle
• Bottom: Approximately 2-inch male thread
• Filter media: Pleated synthetic filtration media
• Package quantity: One filter
• Country of manufacture: USA
• OEM product: Yes

⚙️ Specifications

Manufacturer	Marquis
Manufacturer Number	20690
Product Type	OEM hot-tub filter cartridge
Filtration Area	Approximately 50 sq. ft.
Nominal Length	Approximately 15⅞ to 16 inches
Outside Diameter	Approximately 5⅛ to 5¼ inches
Top Configuration	Closed top with integrated handle
Bottom Connection	Approximately 2-inch male pipe thread
Common Aftermarket Cross-Reference	Unicel 5CH-512
Package Quantity	One filter cartridge
Country of Manufacture	USA
OEM Product	Yes

❓ Frequently Asked Questions

Is this a genuine Marquis OEM filter?

Yes. This is a genuine Marquis OEM replacement filter with manufacturer part number 20690.

Will this fit every Marquis hot tub?

No. Marquis has used different filter sizes and configurations across its collections and production years. Confirm the 20690 part number, physical dimensions and threaded connection before ordering.

Does this filter fit the Marquis V150W?

The 20690 is used in select V150W swim spas from approximately 2019 and newer. However, filtration configurations can vary, so inspect the existing filter and confirm the part number before ordering.

Does this filter fit the Marquis V150P?

The 20690 is used in select V150P swim spas from approximately 2019 and newer. Confirm the filter number, dimensions and threaded connection before purchasing.

Does this fit the Nashville or Nashville Elite?

Generally, no. The Nashville and Nashville Elite typically use a smaller-capacity filter. Confirm the original cartridge before purchasing a replacement.

How many filters are included?

This listing includes one genuine Marquis 20690 filter cartridge.

How many filters does my spa require?

The required quantity depends on the model and filtration configuration. Some Marquis spas use one cartridge, while others use multiple filters. Inspect your filter compartment or consult the spa’s owner’s manual before ordering.

Can this filter be cleaned and reused?

Yes. Rinse carefully between the pleats with a garden hose and periodically use a dedicated spa-cartridge cleaner. Thoroughly rinse away all cleaning solution before reinstalling the filter.

When should the filter be replaced?

Replace the cartridge when the pleats become torn, collapsed or permanently restricted, or when proper water flow cannot be restored through cleaning. Actual service life depends on usage, water chemistry and maintenance.

🛡️ Why Buy From Southern Leisure?

• Genuine OEM Marquis replacement product
• Compatibility assistance from experienced spa professionals
• Help confirming the correct filter before ordering
• Convenient shipping and local pickup options
• Trusted by spa owners since 2013

📦 Shipping & Pickup

• Ships as one genuine Marquis filter cartridge
• Shipping and pickup options are displayed at checkout
• Inspect the cartridge, handle, pleats and threaded connection upon arrival
• Keep the filter clean and protected until installation
• Confirm compatibility before installing or wetting the filter