Booster Cartridge, 12 Stages, Cast Iron Sourcing
The fastest way to find, compare and buy 12-stage cast iron booster cartridges.
Describe your booster pump's model number, Grainger part number, or the failed component symptom. ChatMRO finds the exact match, shows alternatives, and gives you a quote — in seconds. No part number needed.
AI-generated imageA booster cartridge is the complete internal impeller and stage assembly of a multi-stage centrifugal booster pump, containing the shaft, coupling, discharge bearing, and a stack of individual stage components — in this case, 12 stages — that progressively add pressure to water as it passes through each stage in sequence. Because these internal wear components (bearings, seals, impeller stages) see continuous rotational load and water contact, they typically fail well before the pump's outer cast iron housing does, making cartridge replacement a far more economical repair than replacing the entire booster pump.
Water system technicians, well pump installers, and facilities maintenance teams rely on 12-stage cast iron booster cartridges as a direct rebuild solution for Flint & Walling PB-series booster pumps — a widely installed line used to boost water pressure in residential, agricultural, and light commercial water systems. Because the cartridge is cross-referenced across multiple manufacturer model numbers and multiple Grainger part numbers depending on the specific pump variant it fits, sourcing the correct cartridge requires matching either the original pump's manufacturer model number or its Grainger part number rather than assuming any '12-stage' cartridge is interchangeable.
Common configuration: 12 individual pressure stages, cast iron cartridge construction, includes (2) O-rings, a coupling, a discharge bearing, a shaft, and the full set of stage components as a complete kit — everything needed to rebuild the pump's internal wet end in one part. Compatible manufacturer model numbers include PB0512A051 and PB0712A071/PB0712A073 depending on the specific pump variant, with corresponding Grainger part numbers including 1P879, 22W710, 22W711, 22W712, 2P019, 2P423, and 33L694 across different cross-reference listings. A 90-day warranty is commonly offered, with the product made in the United States.
Stop second-guessing. Match your pump's identifying number below — then let ChatMRO's AI surface the exact cross-reference and alternatives in one natural-language search.
Booster pumps identified by the PB0512A051 manufacturer model number. This specific 12-stage cartridge cross-reference dominates here.
Booster pumps identified by the PB0712A071 or PB0712A073 manufacturer model numbers. This 12-stage cartridge cross-reference dominates here.
Applications where the pump actually uses an 11-stage rather than 12-stage cartridge — confirm before ordering.
Flint & Walling's PB series booster pumps use a cross-referenced system of replacement cartridges, with stage count and specific manufacturer/Grainger part numbers varying by pump variant. Here's how to navigate sourcing without a 40-tab browser session.
ChatMRO indexes booster cartridge inventory across manufacturers and cross-reference suppliers. Search any product by description, application, or rough spec.
The direct rebuild solution for PB0512A051-equivalent pumps. Cast iron cartridge, 12 stages, includes shaft, coupling, discharge bearing, and (2) O-rings. Cross-references to Grainger part numbers 1P879 and 22W710.
Search 132939/33L694 Series →Same 12-stage cast iron construction and complete component kit as the 132939-series cartridge, cross-referenced instead to PB0712A071 and PB0712A073 pump variants and Grainger part numbers 22W711, 22W712, 2P019, and 2P423.
Search 134097 Series →Same cast iron construction and complete component kit approach, but built with 11 stages for PB2711A201/PB2711A203 pump variants. Cross-references to Grainger part numbers 22W719, 22W720, 2PC34, and 2PC35. Not interchangeable with 12-stage variants.
Search 11-Stage Series →Use this table as a decision shortcut. Ask ChatMRO for the exact part once you know which row fits your spec.
| Compatible Pump Model | Stages | Grainger Cross-Ref | Best For | Material | Included Components | ChatMRO Verdict |
|---|---|---|---|---|---|---|
| PB0512A051 | 12 | 1P879, 22W710 | Rebuilding this specific PB0512A051-equivalent pump | Cast iron | Shaft, coupling, bearing, (2) O-rings, stages | Confirm this exact model number before ordering |
| PB0712A071 / PB0712A073 | 12 | 22W711, 22W712, 2P019, 2P423 | Rebuilding PB0712A071 or PB0712A073 pumps | Cast iron | Shaft, coupling, bearing, (2) O-rings, stages | Most commonly searched 12-stage cross-reference |
| PB2711A201 / PB2711A203 | 11 | 22W719, 22W720, 2PC34, 2PC35 | Rebuilding a different pump variant using 11 stages | Cast iron | Shaft, coupling, bearing, (2) O-rings, stages | Use only if your pump specifically uses 11 stages, not 12 |
| Additional PB-series variants (22W717/22W718, 22W713/22W714, 22W723/22W724) | Variant-specific | Multiple additional cross-refs | Other PB-series pump variants not listed above | Cast iron | Shaft, coupling, bearing, O-rings, stages | Confirm your pump's exact manufacturer or Grainger number for the correct match |
| Generic Aftermarket Cartridge (unverified fitment) | Variable | Not cross-referenced | Budget, only with confirmed fitment | Variable | Variable | Verify exact stage count and pump model compatibility before ordering |
| Full Replacement Booster Pump (comparison) | N/A (whole pump) | N/A | When the housing or motor has also failed, not just the cartridge | Cast iron housing | Complete pump assembly | Consider only if damage extends beyond the internal cartridge |
Not sure which row is yours? Describe your application to ChatMRO and get an instant AI-matched recommendation with datasheets.
Traditional catalogues force you to know the exact MPN before you find anything. ChatMRO flips that: describe what you need in plain English, and the AI finds the right cartridge from 30M+ indexed parts.
In plain language — by pump model number, Grainger part number, or symptom. No MPN required.
Natural language processing maps your description to the closest-fit products across brands and specs.
Cross-brand equivalents, lower-cost substitutes, and in-stock alternatives shown side-by-side.
Add to cart or request RFQ directly from the results. No phone calls. No email chains.
Whether you're a well pump technician rebuilding a customer's booster pump, or a facilities team stocking spares for a water pressure system — use this framework before you procure.
Look for the model number stamped or labeled on the pump body (e.g., PB0512A051 or PB0712A071/PB0712A073) — this is the most reliable way to identify the correct cartridge, since multiple cartridges share the same '12 stages, cast iron' description but fit different specific pump variants.
If the pump's original manufacturer model number has worn off or isn't legible, a Grainger part number from prior purchase records (e.g., 1P879, 22W711, 33L694) can help identify the correct cross-reference.
12-stage and 11-stage cartridges are not interchangeable even though they share very similar descriptions and component lists — confirm the exact stage count for your specific pump before ordering.
A complete cartridge kit should include the shaft, coupling, discharge bearing, and (2) O-rings alongside the stage components — confirm this matches what you need for a full internal rebuild versus a partial parts order.
If only the internal wear components have failed and the cast iron housing and motor are intact, cartridge replacement is typically far more economical than replacing the entire pump.
Multiple different cartridges share the same 12-stage, cast iron description but cross-reference to different specific pump models. Search by function on ChatMRO — the AI surfaces exact matches AND available substitutes once you provide your pump's specific model number.
These are built for different specific pump variants and are not interchangeable despite very similar part descriptions and included components — always confirm stage count matches your pump exactly.
If the outer cast iron housing and motor are still functional, a cartridge-only replacement is typically much more cost-effective than a full pump replacement.
Describing your application to ChatMRO takes 30 seconds. The AI reads booster cartridge cross-reference listings across suppliers so you don't have to.
A complete cartridge kit typically includes the shaft, a coupling, a discharge bearing, (2) O-rings, and the full set of 12 individual stage components — everything needed to rebuild the pump's internal wet end assembly in one part. Search this cartridge type on ChatMRO to compare pricing and availability instantly.
Check your pump for its manufacturer model number (such as PB0512A051 or PB0712A071/PB0712A073) — this is the most reliable identifier, since multiple different cartridges share the same general '12 stages, cast iron' description but are built for different specific pump variants and are not universally interchangeable. ChatMRO can help match your specific pump model to the correct cartridge from a single description search.
The internal cartridge components — bearings, seals, and impeller stages — see continuous rotational and water-contact wear and typically fail well before the pump's outer cast iron housing does, making cartridge-only replacement a significantly more economical repair than replacing the entire pump when the housing and motor are still functional. ChatMRO provides access to both cartridge-only and full pump replacement options from search results.
No — 11-stage and 12-stage cartridges are built for different specific pump variants and are not interchangeable, even though they share very similar part descriptions and included components; confirm your pump's exact stage count and model number before ordering. If you're unsure which stage count your pump requires, describe your application to ChatMRO and get an AI recommendation in seconds.
ChatMRO indexes booster cartridge inventory from multiple distributors across India, Southeast Asia, US, and EU. Search by part name, description, or rough spec — you'll see real-time stock levels and can request a quote in under 60 seconds without calling a single distributor.
Yes — that's exactly what ChatMRO is built for. Describe your booster pump's model number, Grainger part number, or the symptom you're seeing in plain English. The AI matches your description against 30M+ indexed parts and returns the closest booster cartridge SKU with datasheet, alternatives, and a quote option. Try it now — no account required.
Just describe what you need. ChatMRO finds the right booster cartridge in seconds.
12-stage cast iron booster cartridges are among the most frequently sourced rebuild components for Flint & Walling PB-series booster pumps used in residential, agricultural, and light commercial water pressure systems. This cartridge class commands significant market presence due to its complete internal rebuild kit design — bundling the shaft, coupling, discharge bearing, O-rings, and full stage component set into a single part — and its cross-reference compatibility across multiple manufacturer and Grainger part numbers depending on the specific pump variant. Procurement professionals and well pump technicians in India, Southeast Asia, and North America regularly source these cartridges for booster pump rebuild and maintenance work.
ChatMRO simplifies this procurement process by providing AI-powered natural language search across a catalogue of 30 million+ indexed industrial parts. Buyers no longer need to memorize model codes or navigate multi-level filter trees to find the right cartridge. A simple description of the pump model number, Grainger part number, or failure symptom is sufficient to surface the correct product alongside cross-brand alternatives and real-time pricing.
