YANHUA PRB50 Hot Tub Filter, 50 sq. ft.

The YANHUA PRB50 hot tub filter is a single replacement cartridge listed for a 50 sq. ft filtration area and compatibility with several named filter models. Its listed dimensions differ slightly from the cartridge measurements in the product details, so compare both with your existing filter before ordering.

At a glance

Listed for a 50 sq. ft filtration area and as a replacement for several named cartridges.
The listing describes pleated filter fabric intended to capture hair, leaves, dust, sediment and sand.
The manufacturer says the cartridge can be washed after use.

Price

£17.84Save 15%

Reference price: ~~£20.99~~

Price checked: 12 Nov 2026

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Often bought together

YANHUA PRB50-IN C-4950 Hot Tub Filter,Spa Filters for 50 Sq. Ft 1 Pack | Replacement for PRB50-IN,for Unicel C-4950, for Filb

£36.99

Pros and cons

Pros

The named replacement models provide useful compatibility references when matching a cartridge.
The washable design may suit owners who prefer to clean and reuse a filter rather than replace it after each use.

Technical specifications

9 specifications

Identity
Brand	YANHUA
Model	YANHUA-PRB50
Part number	PRB50

Filtration and compatibility
Filtration area	50 sq. ft.
Replacement models listed	Compatible with PRB50-IN, Unicel C-4950, Filbur FC-2390, Darlly SC706, Pentair R173434.

Dimensions and installation
Dimensions listed	12.7 x 12.7 x 33.02 cm; 430 g
Cartridge measurements listed	Spa Filter Length:13 5/16”(33.8cm),Outside Diameter: 5”(12.5cm), Top Hole:2 1/8”(5.4cm) , Bottom Hole:2 1/8”(5.4cm)

Construction and care
Filter material and construction	Triple laminated poly-constructed inner scrim is topped by a premium weather resistant top coating, PP polyester material
Core and handle	break-resistant handle, big-flow ABS inner core

What to know before buying

Listing details to confirm

The listing gives conflicting dimensions: product dimensions are 12.7 x 12.7 x 33.02 cm, while cartridge measurements are 12.5 cm diameter by 33.8 cm long, with 5.4 cm openings at both ends. Verify the fit and opening sizes against your existing cartridge before buying. The title states one pack.

Who is it for?

A good fit for

Hot tub owners replacing a cartridge marked PRB50-IN, C-4950, FC-2390, SC706 or Pentair R173434, after checking dimensions and fit.
Buyers looking for a washable replacement cartridge with a stated 50 sq. ft filtration area.

Less suited to

Buyers who need confirmed dimensions matching their spa without checking the conflicting measurements in the listing.
Buyers whose required filter model is not among the listed compatibility references.

YANHUA PRB50 Hot Tub Filter, 50 sq. ft. · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 82 ratings

5 stars81%81%
4 stars3%3%
3 stars0%0%
2 stars6%6%
1 star10%10%

Aggregate ratings lean strongly towards five-star, but a smaller share are one- or two-star. With no written feedback supplied, the reasons for those ratings are unknown. Ratings alone cannot establish fit or filtration performance, so check the cartridge dimensions and compatibility for your spa.

Frequently asked questions

Which filter models does the listing name as compatible?

It lists PRB50-IN, Unicel C-4950, Filbur FC-2390, Darlly SC706 and Pentair R173434. Confirm the cartridge dimensions and end openings match your spa's existing filter.

What is the stated filtration area?

The listing states a filtration area of 50 sq. ft.

Are the dimensions consistent across the listing?

No. The product dimensions are 12.7 x 12.7 x 33.02 cm, while separate cartridge measurements give 12.5 cm diameter and 33.8 cm length. Check your existing filter before ordering.

Can the filter be cleaned and reused?

The manufacturer describes the cartridge as washable. The listing does not provide a cleaning schedule or service-life measurement.