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10" Clear Sediment Filter Kit with Pressure Relief
Lead time: Expected restock date is November 12, 2026. Order now and we ship as soon as stock lands.
Part R51046 is Pentair's sediment-configured Dura-Series kit: the 10" clear-sump polycarbonate housing with a stainless pressure-relief button, a sediment cartridge, and the SW-1B sump wrench. The clear sump lets you watch the cartridge load up so you change it on condition, not on a calendar.
Everything but the bracket
- ✓ Reinforced polypropylene cap (slate) with pressure-relief button
- ✓ 10" clear polycarbonate sump
- ✓ #241 EPDM O-ring, factory installed
- ✓ 10" x 2.5" sediment cartridge (as packaged by Pentair)
- ✓ SW-1B sump wrench
- ✗ MC-1A mounting bracket (150578)
Materials and operating limits
| Sump Material | Polycarbonate (Clear) |
| Cap Material | Reinforced polypropylene (Slate) |
| O-Ring | #241 EPDM, radial seal |
| Button Assembly | 300-series stainless steel, EPDM, polypropylene |
| Port Size | 3/4" NPT inlet & outlet |
| Cartridge Size | 10" x 2.5" (fits 2-1/2" to 2-7/8" diameter) |
| Maximum Pressure | 125 PSI (8.6 bar) |
| Temperature Range | 40–125°F (4.4–51.7°C) |
| Initial Pressure Drop | 1.7 PSI @ 10 GPM, empty housing |
| Maximum Dimensions | 12.26" x 5.00" (311 mm x 127 mm) |
Dura-Series construction
Polycarbonate Sump
Dura-Series sumps are molded from polycarbonate instead of polypropylene or SAN, for a tougher housing that shrugs off the stress of repeated cartridge changes.
Radial EPDM O-Ring
The radial seal design seats the O-ring on the side of the sump, so the seal doesn't depend on how hard you tighten — it resists leaks from over- and under-tightening alike.
Hard-Stop Threading
The sump threads to a positive stop against the cap. When it stops, it's fully installed — no guessing, no cracked caps from cranking too far.
Drill Bosses & Mount Points
Cast-in bosses on the cap accept pressure gauges and sensors, and dedicated mounting locations line up with the standard MC-1A bracket.
Four steps to a leak-free install
- Shut off the water supply and open a downstream faucet to relieve pressure. Allow at least 2-1/4" of clearance below the housing for cartridge changes.
- Wrap the 3/4" NPT inlet and outlet threads with PTFE tape and plumb the cap in the direction of the flow arrows. Mount the cap to the wall with an MC-1A bracket (sold separately).
- Apply a generous coat of silicone grease to all surfaces of the EPDM O-ring and seat it in the sump groove. Drop in your cartridge and thread the sump up until it stops against the cap.
- Turn the water back on slowly, press the pressure-relief button (PR models) to purge trapped air, and check for drips before closing the faucet.
Pro tip: Pentair rates the sump for replacement every five years. Keep a spare #241 EPDM O-ring (R51120) on hand and swap it any time you see nicks, flattening or weeping at the cap.
Refill with any standard 10" cartridge
When the included cartridge loads up, replace it with any 10" x 2.5" sediment cartridge — Pentek string-wound, spun polypropylene or pleated, or our IPW sediment filters — or switch the housing to carbon block or GAC for taste and odor. Change sediment cartridges every 3–6 months or when pressure drop becomes noticeable.
Ships from California
Packed and shipped from our Santa Ana warehouse
Genuine Pentek
Authentic Pentair Dura-Series product with the Pentair symbol molded inside the cap
Build Help
Not sure what fits? Call (877) 541-6603 and we'll match the right housing, cartridge and hardware
