For a two-handle Pfister sink faucet whose diagram names this pair, use 910-0310 on the hot side and 910-0320 on the cold side. The shorter drawing numbers are 910-031 and 910-032. Identify the faucet before ordering either part.
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Buying Pfister faucet parts starts with the manufacturer service number. We compared the brand catalog, separate model sheets and a parts explosion with exact Amazon model fields. This is a document-based guide to the hot/cold sink pair, without hands-on testing.
Pfister parts by number: hot and cold are separate
| Order number | Part job | Drawing name |
|---|---|---|
| 910-0310 | Hot-side ceramic cartridge | 910-031 |
| 910-0320 | Cold-side ceramic cartridge | 910-032 |
Pfister’s current catalog identifies these as quarter-turn ceramic-disc cartridges with plastic stems. Its separate specification sheets distinguish the hot part from the cold part. A correct brand and a similar silhouette are not enough: identify the faucet model and the side specified in its parts drawing.
This guide covers a useful pair of two-handle sink service parts, not every cartridge Pfister has made. For a shower valve, use the Pfister 0X8 and Avante identification guide. For replacing the entire fixture, the Pfister bathroom faucet guide compares complete models.
910-0310: the hot-side cartridge
Choose 910-0310 when your exact parts diagram specifies 910-031 for the hot valve. The maker’s product page calls it the ceramic-disc hot-side quarter-turn cartridge. The separate SS-910-031X specification names 910-031, identifies the plastic stem, and labels its job as the hot side.
The hot-side label matters even when the two cartridges look alike on a screen. Do not buy two identical hot cartridges as a shortcut for servicing both handles. Record the required side for each assembly and check that the selected package number matches it.
Skip this cartridge if the faucet drawing specifies another number, if you need the cold-side 910-032, or if the faucet is a single-handle or shower design with a different service assembly. This is not a universal replacement for all Pfister ceramic valves.
The checked Amazon listing names model 9100310. Pfister’s own support answer explains that these service numbers can appear with or without the hyphen and with an extra trailing zero in systems that use seven digits. That cross-reference supports this particular listing match; it does not authorize ignoring other differences in a part number.
Check Pfister 9100310 hot cartridge on Amazon →
910-0320: the cold-side cartridge
Choose 910-0320 when the diagram specifies the corresponding 910-032 cold valve. Pfister’s product page names the cold-side quarter-turn cartridge, and the separate SS-910-032X sheet confirms its ceramic-disc construction and plastic stem. Its role is different from the hot-side part above.
The checked listing identifies model 9100320. As with the hot part, the drawing may use the shorter hyphenated service number. Keep a photograph or saved copy of that drawing with the order so that the person doing the repair can verify the match.
Skip it for a hot-side replacement or when a different cartridge is named in the model’s diagram. Do not decide from the direction a damaged handle happens to turn. Confirm the intended handle arrangement and the specified service part before ordering.
If both sides are being serviced, list the hot and cold numbers separately. Do not assume a listing contains a pair: these are separate purchase destinations, and you should verify the quantity and package contents for each selected offer. A headline showing both numbers can describe aftermarket compatibility rather than two genuine Pfister parts.
Check Pfister 9100320 cold cartridge on Amazon →
Read the whole parts drawing, not just the cartridge callout
We opened Pfister’s own parts explosion for the 36 Series Treviso two-handle kitchen faucet. It labels 910-031 as hot and 910-032 as cold and shows other assemblies under their own numbers. It is an example of how to read a brand parts drawing, not a claim that every Treviso or every Pfister faucet uses the same parts.
In that drawing, the retaining part is labeled 962-042, while the handle and spout components have different callouts. Those numbers illustrate why replacing a cartridge does not automatically replace a handle, retaining nut or other worn component. We have not made those surrounding parts purchase picks here.
The drawing is dated October 15, 2009. That date is relevant for an older installed fixture. Use the drawing that matches your actual model and production version; do not treat an older catalog sheet as a complete list of today’s faucet lineup.
A practical order record has one line per required assembly: the diagram number, the function, the finish if relevant, and the package quantity. This makes it easier to spot an unrelated repair kit or an item that supplies only one piece of the work you planned.
When an old number or a missing hyphen causes confusion
Pfister’s own support answer says 910-031 and 910-032 may be shown as 910-0310 and 910-0320, or without the hyphen. That is why the maker sheet and the checked Amazon model field can be reconciled without relying on a retailer’s guess.
The same maker support answer identifies discontinued 910-024 and 910-025 cartridges as earlier parts replaced by 910-031 and 910-032. For an older installation, have Pfister confirm the retrofit against the faucet model and the original retaining arrangement. The answer discusses a specific older brass-nut arrangement; we do not turn it into a universal installation instruction.
Do not extend that naming rule to unrelated numbers such as 974-series shower parts. A shared brand name or a similar length does not establish the same mechanism. If the model is unknown, identify it before ordering rather than choosing whichever search result looks closest.
When you ask the maker for help, provide the faucet model, a photograph of the whole fixture, the problem, the original part number if known, and whether the hot or cold valve is involved. Keep any old packaging that shows what was already tried.
Use the dimensions as a cross-check, not a fit guarantee
Each maker sheet shows a two-inch overall cartridge dimension and a 27/32-inch body dimension. Those shared dimensions are useful for spotting an obviously different part, but they do not make the hot and cold pieces interchangeable. The maker still assigns them different service numbers.
A photograph cannot establish internal fit on its own. Nor can an isolated dimension confirm handle engagement, the retaining arrangement or the complete repair procedure. Treat the model-specific parts drawing as the deciding reference and use the dimensions as a secondary check.
If a previous replacement did not fit the handle, do not force the handle or change the cartridge to make the pieces meet. Stop and identify the mismatch with Pfister or a licensed plumber. A partial repair history is useful evidence, but an already-installed replacement is not proof that its part number was correct.
Before the repair: isolate the faucet and plan the whole job
This is a parts selection guide, not a substitute for the exact faucet’s service instructions. Have the repairer confirm how the handle and retaining components are removed, what must be kept, and what is supplied in the replacement package. Do that before disassembling a faucet that still needs to serve the room.
Arrange reliable water isolation before opening a valve assembly. If the shutoffs do not isolate the faucet, the retaining hardware is seized, the body is damaged, or the model cannot be identified, have a licensed plumber assess it. Avoid turning a cartridge replacement into an improvised repair to the faucet body.
For a complete kitchen fixture rather than service parts, see our Pfister kitchen faucet comparison. A cartridge purchase is most useful when the rest of the faucet is worth repairing and the exact replacement is known.
Warranty route and exact Amazon offers
Pfister’s product support pages recommend contacting customer service before ordering if you are unsure about warranty coverage. They ask for a problem description, model, purchaser information and purchase date, with proof or inspection if requested. Check that route before paying for a service part.
We did not verify the full warranty terms or your eligibility, and we do not promise free parts or paid installation. A warranty headline is not a finding that a particular owner, seller or repair is covered. Keep the purchase record and confirm the conditions with Pfister.
On October 17, 2026, the Amazon Creators API identified both linked parts as new, in stock, and sold by Amazon.com, with each selected offer marked as the buy-box winner. The exact model fields were 9100310 and 9100320. Sellers, stock and selected variants can change; verify them again at checkout.
We excluded compatible aftermarket cartridges and shower-valve parts from these picks. We quote no prices and claim no hands-on testing or guaranteed repair outcome. The recommendation is an exact-part match after model identification, not a claim that one cartridge is better for every faucet.
Frequently asked questions
Are 910-031 and 9100310 the same Pfister part?
Pfister’s support answer explains the hyphen and trailing-zero naming variants. Its current product page identifies 910-0310, while its separate maker sheet names 910-031. Confirm that exact part against your faucet drawing.
Which Pfister cartridge is hot and which is cold?
For this pair, 910-0310 is the hot-side cartridge and 910-0320 is the cold-side cartridge. The maker assigns separate numbers even though their published outline dimensions are similar.
Does this pair fit every Pfister two-handle faucet?
No. Use the exact faucet model and parts diagram. These pages and model sheets document a particular service pair, not universal compatibility with every Pfister sink or tub faucet.
Do these purchase links include both sides?
The links are separate hot and cold listings. Verify the quantity and package contents for each selected offer instead of assuming one listing supplies both sides.
Will Pfister supply the parts under warranty?
Eligibility and full terms were not verified. Pfister recommends contacting its support team with the model, purchase information and problem before ordering if coverage is uncertain.
How we chose
We opened Pfister product pages, separate hot and cold specification sheets and the maker Treviso parts diagram; checked the maker explanation of naming variants; and confirmed exact new Amazon.com buy-box offers. The existing Pfister shower guide serves a different mechanism and shares neither pick. Read our selection method and about Plumbing Picks.
Primary sources
- Pfister 910-0310 product catalog (pfisterfaucets.com): Exact hot cartridge identity.
- Pfister 910-0320 product catalog (pfisterfaucets.com): Exact cold cartridge identity.
- Pfister SS-910-031X model sheet (pfisterstorage.blob.core.windows.net): Separate hot part document, July 23, 2018.
- Pfister SS-910-032X model sheet (pfisterstorage.blob.core.windows.net): Separate cold part document, June 12, 2019.
- Pfister 36 Series Treviso parts explosion (pfisterstorage.blob.core.windows.net): Hot/cold callouts and surrounding assemblies; October 15, 2009.
- Pfister support answers for 910-0310 (pfisterfaucets.com): Maker explanation of shorter/longer part numbers and legacy replacements; sources read October 17, 2026.