A sudden hiss escapes from the equipment pad just as the circulation pump kicks into high gear, followed by a steady sheet of water creeping across the concrete. A hairline fracture along the lower tank or a degraded bulkhead seal turns everyday filtration into an immediate headache. Left unchecked, that tiny fissure bleeds system pressure, starves return jets, and lets fine dirt bypass the media entirely. Instead of crisp, inviting water, the result is an unusable pool while runaway moisture soaks the slab and strains the pump motor.
Getting back to a bone-dry equipment pad and balanced water flow rarely requires replacing the entire filtration setup. A targeted fix for a compromised pool bottom filter housing, lower manifold, or base fitting starts with the exact model series stamped on the original tank label. Verifying port threading and pipe diameters ensures an exact watertight seal on the first try, preventing pressure loss before unfiltered debris can circulate back into the pool. The options below deliver reliable replacements to eliminate stubborn base leaks and restore proper filtration fast.
Base: 2.36 inches; Diameter of the plunger part: 0.98 inches; Height/Depth: 1.56 inches.Part for Pump models 530/1000 gph or smaller. Made of plastic.This Replacement Strainer Hose Hole Plug for Intex, Bestway, Coleman, Summer Escape swimming pools that do not have plunger valves so you can replace
Key specs
- Port and Hose Compatibility
- 1.25-inch hoses without plunger valves
- Supported Pump Rating
- 530 or 1000 GPH and smaller
Pros:
- Blocks water flow through 1.25-inch strainer holes during filter cartridge changes or maintenance
- Compatible with Intex, Bestway, Coleman, and Summer Escape pools lacking shut-off plunger valves
- Compact plastic build with a 2.36-inch base and 0.98-inch plunger diameter to seat firmly into openings
- Comes in a two-pack to seal both intake and return wall ports at the same time
Cons:
- Limited to 1.25-inch hose ports on pumps rated at 530 or 1000 GPH and smaller
- Lacks compatibility with larger 1.5-inch threaded pool fittings or plunger valve assemblies
Compatibility: This air relief valve works with all FNS, FNS Plus, SMBW 2000 Series and 4000 Series, Clean and Clear (ccp100, ccp320, ccp420, ccp520), Quad DE 60, 80 and 100 and all Predator Filters.Compatibility: 188592, 188593, 188594, 160316, 160317, 160318, 160301, 160332, 011555, 147411, 180007
Key specs
- Connection Fitting
- 1/4-inch NPT bottom mount
- Pressure Dial Range
- 0 to 60 PSI
Pros:
- Combines a 60 PSI pressure gauge with an integrated air relief valve in one assembly
- Standard 1/4-inch NPT bottom mount threads directly into Pentair, Hayward, and Jandy filter tanks
- Fits numerous filter lines including Clean and Clear, Quad DE, and FNS Plus series
- Manual relief valve releases trapped tank air until water sprays out to confirm complete purging
Cons:
- Requires applying Teflon tape on threads during setup to prevent slow pinhole leaks
- Limited to bottom-mount ports and will not install on back-mount filter gauge connections
Bottom tank assembly with drain plug replacementFits Pentair Clean & Clear Plus pool and spa cartridge filterAlso fits Pentair Quad D.E. pool and spa filterAvailable in almond color
Key specs
- Filter Series Compatibility
- Fits Pentair Clean and Clear Plus cartridge filters and Quad DE pool and spa filters.
- Drain Feature
- Includes replacement drain plug
Pros:
- Direct replacement lower tank assembly restores cracked or leaking Pentair filter housings
- Includes the lower drain plug assembly to simplify winterization and water drainage
- Engineered specifically to mate with Clean and Clear Plus and Quad DE upper tank shells
- Almond finish matches original factory Pentair equipment pad specifications
Cons:
- Bulkhead fittings, clamp band, and internal cartridges or grids must be transferred from the old filter
- Dedicated to Pentair Clean and Clear Plus and Quad DE models without fitting other filter lines
Bottom manifold assembly replacementFits Pentair Clean & Clear Plus aboveground fiberglass cartridge filters
Key specs
- Internal Placement
- Bottom collector manifold for cartridges
- Housing Line
- Pentair Clean and Clear Plus
Pros:
- Direct fit internal bottom manifold seats cartridge elements firmly inside Clean and Clear Plus tanks
- Prevents unfiltered pool water from bypassing cartridge bases and returning to the pool
- Lightweight fiberglass-compatible construction matches original Pentair equipment tolerances
- Compact 6-by-6-inch form factor simplifies installation through the filter opening
Cons:
- Designed exclusively for Pentair Clean and Clear Plus fiberglass cartridge models
- Does not include mounting hardware, top manifold, or replacement filter cartridges
Key specs
- System Fitment
- Hayward Super Star-Clear
- Assembly Dimensions
- 17 x 7 x 16 inches
Pros:
- Direct replacement lower collection manifold for Hayward Super Star-Clear filter tanks
- Collects filtered water efficiently across the base of the multi-cartridge cluster
- Sized precisely at 17 by 16 inches to drop directly into Hayward lower housing cavities
Cons:
- Unbranded replacement listing requires checking model number CX3000C against original specs
- Does not include internal riser pipes, top closure plate, or sealing O-rings
Replacement pressure gauge 0-60 PSI for Pentair and Hayward pool filtersPentair 190058 replacementMade by CMP
Key specs
- OEM Cross Reference
- Pentair 190058
- Measurement Span
- 0-60 PSI
Pros:
- Replaces failed Pentair 190058 gauges on Pentair and Hayward bottom-mount relief valves
- Reads operational filter tank pressures accurately across a standard 0 to 60 PSI dial
- Ultra-lightweight construction installs quickly onto existing lower port fittings
Cons:
- Dedicated gauge unit that does not include a replacement air relief valve assembly
- Bottom mount design will not fit filters plumbed with rear or side gauge connections
Fitment: Fits Pentair Clean & Clear, Warrior, EasyClean, Triton C-3 pool and spa filter systems,fits Pentair Clean & Clear Plus, Predator pool and spa cartridge filters.Compatible with Pentair EasyClean, FNS Plus, Quad, Warrior pool and spa D.E. filter models FNSP24, FNSP36, FNSP48, FNSP60.Pentair S
Key specs
- Bezel Function
- Twist-to-move bezel marks clean baseline and indicates when backwashing or cleaning is due.
- Filter Series Range
- Pentair Clean and Clear and Predator
- Pentair EasyClean and FNS Plus DE
- Quad DE models FNSP24 through FNSP60
- Sta-Rite 1.5-inch multiport valves
Pros:
- Movable bezel allows setting clear visual start and clean baseline pressure markers
- Broad compatibility covering Clean and Clear, FNS Plus, Quad DE, and Sta-Rite multiport valves
- Protective black plastic housing shields dial internals from outdoor pool pad exposure
- Standard threaded bottom fitting screws into common 190058 relief valve ports
Cons:
- Installation instructions are not included in the package
- Requires careful manual tightening and Teflon tape to avoid stripping or cracking the port
Bottom housing assembly replacementFits Zodiac Jandy CS Series cartridge pool and spa filter models CS100, CS150, CS200, CS250
Key specs
- Compatible Jandy Models
- Jandy CS100
- Jandy CS150
- Jandy CS200
- Jandy CS250
- Component Weight
- 13.11 lb
Pros:
- Restores cracked or leaking tank bases across the entire Zodiac Jandy CS filter range
- Direct OEM replacement specifically molded for CS100, CS150, CS200, and CS250 models
- Heavy-duty 13.11-pound construction handles system operating pressure without flexing
- Resolves equipment pad flooding caused by hairline cracks in the lower housing
Cons:
- Confined exclusively to Zodiac Jandy CS Series filters and will not fit CL or CV models
- Upper tank shell, cartridge element, and clamp ring must be retained or sourced separately
Fits SwimClear and SuperStar-clear cartridge filtersFits Hayward swim clear and super star clear series cartridge filtersHolds four cartridgesMay also require top closure plate
Key specs
- Cartridge Capacity
- Holds four cartridges
- Hayward Housing Fit
- Compatible with Hayward SwimClear and Super Star-Clear series cartridge filters.
Pros:
- Holds and aligns four filter cartridges securely across the bottom of the housing
- Genuine Hayward replacement part designed for SwimClear and Super Star-Clear series
- Durable 3.18-pound molded structure prevents internal flexing under high hydraulic return flow
- Restores proper internal water routing to prevent uncleaned pool water from bypassing filters
Cons:
- May require purchasing a matching top closure plate separately to complete cartridge alignment
- Specific to Hayward multi-cartridge configurations and will not fit single-cartridge setups
Bottom Bulkhead ReplacementFits Pentair Clean & Clear Plus Pool And Spa FilterAlso Fits Pentair Quad D.E; Pool And Spa FilterCountry Of Origin: United States
Key specs
- Fitting Role
- Bottom bulkhead pipe connection
- Filter Line Match
- Direct replacement for Pentair Clean and Clear Plus and Quad DE filters.
Pros:
- Replaces cracked lower tank bulkheads to stop water spraying or dripping at pipe unions
- Direct OEM fit for Pentair Clean and Clear Plus and Pentair Quad DE filter tanks
- Compact 6-by-6-inch fitting manufactured in the United States to factory tolerances
- Restores a leak-free plumbing connection between external pipes and the lower tank shell
Cons:
- Dedicated strictly to lower tank bulkhead ports on specified Pentair cartridge and DE filters
- O-rings or union nuts may need to be inspected or transferred if not fully intact
Last update on 2026-10-08 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API
Can you replace just the bottom tank housing without buying an entirely new filter?
Yes, you can replace a cracked or leaking lower tank shell without purchasing a complete filtration system. Manufacturers offer direct replacement lower housings, such as the Pentair 178578 almond bottom tank assembly with drain plug for Clean & Clear Plus systems or the Zodiac R0462900 bottom housing assembly for Zodiac Jandy CS Series models CS100, CS150, CS200, and CS250. Swapping only the damaged bottom half preserves your existing top dome, clamp band, and internal pipe assemblies while eliminating pad flooding.
How do you know which bottom collector manifold fits your cartridge filter?
Match the manifold part number directly to your exact filter model line and cartridge setup. Bottom collectors are molded to hold specific cartridge configurations securely over the lower plumbing. For example, the Pentair 170040 bottom manifold assembly fits Pentair Clean & Clear Plus fiberglass filters, which pairs with standard cartridge filter replacements for Pentair Clean and Clear Plus setups. Similarly, the Hayward CX3000C collector manifold is built specifically for Hayward SwimClear and Super Star-Clear series filters.
What thread size is required for a bottom-mount filter pressure gauge?
Most pool filter gauges use a standard 1/4-inch NPT bottom mount connection. Replacement units rated up to 60 PSI, like the Swimables 1/4-inch NPT gauge or CMP part 190058 replacements, screw directly into the air relief or filter valve port. This fitting matches Pentair Clean & Clear, Clean & Clear Plus, EasyClean, Triton C-3, and Predator cartridge lines, along with FNS Plus models FNSP24, FNSP36, FNSP48, and FNSP60, and Sta-rite 1-1/2-inch multiport valves.
What causes water to pool around the bottom bulkhead of a filter?
Water pooling around the base usually stems from worn bulkhead gaskets, hairline cracks in the plastic threads, or degraded drain plug seals under heavy hydraulic pressure. Replacing worn components like the Pentair 178575 bottom bulkhead on an inground swimming pool filter restores a watertight connection between the lower internal plumbing and exterior union fittings. Inspect the tank wall around the bulkhead port carefully to confirm the leak comes from the fitting rather than a fracture in the housing.
How do bottom stopper plugs prevent water loss during pump or filter maintenance?
Plugging the suction and return ports blocks water flow from the pool when your equipment sits below the water line without isolation valves. Plastic strainer stopper plugs, like the RLECS SPFPSSWP-B2 with a 0.98-inch plunger diameter and 2.36-inch base, insert directly into the wall fittings on pump models 530/1000 gph or smaller. This keeps your pool water contained while you disassemble filter housings, service bottom manifolds, or swap damaged base parts.
Will a bottom filter housing fit different capacity models within the same series?
Yes, many filter lines share identical lower tank dimensions across several square-footage ratings in the same product family. For instance, the Zodiac R0462900 bottom housing assembly fits four different Zodiac Jandy CS Series sizes: CS100, CS150, CS200, and CS250. Always confirm the exact model series on the manufacturer tank label before purchasing, because changes in series generations or plumbing bulkhead spacing will prevent a secure seal.
