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Chicago Faucets’ 420 Series includes manual lavatory faucets both with and without built-in scald protection. The protected options are the thermostatic 420-T configurations: look for the “T” designation and verify the complete model number, because protection is not a feature of every 420 Series faucet. The exact choice also matters for maximum outlet temperature, flow rate, connections, and approved operating limits.
Which 420 Series faucets include scald protection?
The manufacturer identifies the 420-T as a manual, deck-mounted lavatory faucet with built-in ASSE 1070-certified scald protection. That description applies to the thermostatic T configurations, not automatically to the full 420 Series. A non-T 420 model should not be assumed to have the same feature.
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For example, Chicago Faucets lists model 420-T41E2805ABCP as a deck-mounted manual faucet with built-in protection and a 0.5 GPM outlet. The model number is more useful than a general “420 Series” description when checking a schedule, submittal, replacement order, or dealer quote.
The manufacturer’s March 2025 Scald Protection Products literature says, “ASSE 1070 certified scald protection is built into the faucet.” Treat that as the manufacturer’s description of the protected T configurations; it is not a claim that all faucets in the series are protected or that every model has identical temperature and flow limits.
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Chicago Faucets describes the broader 420 Series as manual single-handle lavatory faucets available with or without built-in scald protection. That distinction is useful when reviewing product listings or a fixture schedule: a series name identifies a family, while the complete model number identifies the configuration being offered. If a quote or submittal omits the T designation or full part number, ask the supplier to clarify before approving it.
How does the built-in protection work?
The protection is integrated into the faucet cartridge rather than being a separate external mixing valve described in the product information. Chicago Faucets describes the thermostatic ceramic cartridge as having a built-in check valve and thermostatic element. The replacement part catalog identifies 420-X41KJKABNF as a thermostatic ceramic cartridge with those features.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsThe practical point for specification is that the cartridge configuration is part of the faucet’s safety function. Select a protected T model when that function is required, and use its own specification sheet to confirm the temperature limit and permitted flow. Do not infer a specific maximum temperature from the series name alone or assume that a replacement cartridge fits every faucet marked 420; verify exact compatibility against the installed faucet and current parts documentation.
ASSE 1070 certification is listed for the protected configuration, but that does not remove the need to follow applicable project requirements, installation instructions, and local code. The faucet is one component in a plumbing installation, and the project’s responsible specifier or plumbing professional should confirm that the selected model is appropriate for the intended use.
For service work, first record the faucet’s full model identification and compare it with the cartridge listing. The cataloged 420-X41KJKABNF is a specific thermostatic ceramic replacement part, not a guarantee that one cartridge fits every 420 faucet. Confirm fit and service instructions with the manufacturer’s current parts documentation or an authorized dealer before ordering or beginning a repair.
What is the difference between the T41 and T45?
The T41 and T45 are distinct thermostatic configurations, and their documented maximum outlet temperatures differ. Chicago Faucets’ model literature lists T41 flow options with a 105°F maximum and T45 options with a 113°F maximum. Those are configuration-specific figures, so consult the actual model sheet rather than treating either number as universal for the 420-T family.
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| Configuration | Documented flow options | Documented maximum outlet temperature | Important qualification |
|---|---|---|---|
| 420-T41 family | 1.5, 1.0, 0.5, and 0.35 GPM | 105°F | Options vary by model; verify the full part number. |
| 420-T45 family | 0.5 and 0.35 GPM in the family literature | 113°F | The 420-T45ABCP sheet documents its own outlet and limits; use that sheet for the exact model. |
| 420-T41E2805ABCP | 0.5 GPM | Use the applicable current model documentation | Manufacturer product page identifies built-in ASSE 1070 protection. |
| 420-T45ABCP | 1.5 GPM on its product sheet | 113°F | Sheet also specifies a 0.35 GPM minimum approved flow for temperature limiting. |
The model-specific T45ABCP sheet lists 1.5 GPM for that faucet, while Chicago Faucets’ broader scald-protection literature lists 0.5 and 0.35 GPM options for the T45 family. These figures should not be blended into a presumed single specification: the 1.5 GPM number belongs to the identified T45ABCP sheet, and the family table describes other listed options. Confirm the outlet code and current documentation for the precise model under consideration.
The same caution applies to temperature. The T41 family table lists 105°F maximum, while the T45ABCP sheet lists 113°F. A project that specifies a particular maximum outlet temperature should state the required limit and confirm that the offered complete model meets it; choosing only by series or appearance is not enough.
In practical terms, compare the T41 and T45 by the project’s temperature target and the model’s available flow and outlet configuration—not by assuming one is universally preferable. The documented T41 family maximum is lower, at 105°F, while the T45ABCP sheet gives a maximum of 113°F. The relevant choice depends on the design requirement and the exact part being submitted. If a project needs a specific outlet rate, confirm that the desired rate is actually offered for that configuration and appears on its current sheet.
What flow and operating limits should a specifier check?
Flow rate is model-dependent, and the allowable operating range matters alongside the headline maximum temperature. The 420-T45ABCP product sheet, revised April 9, 2026, gives a rated operating pressure of 20–125 PSI and a rated hot-inlet operating temperature of 100°F–180°F. It states that 0.35 GPM is the minimum approved flow rate for temperature limiting.
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Some outlet options in the manufacturer’s literature are marked vandal-proof. If vandal resistance is a project requirement, check the individual model designation and its product documentation rather than assuming every flow option has that outlet construction.
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Flow is more than a water-use comparison. It can determine whether the selected outlet meets the project’s use and performance criteria, and for the cited T45ABCP sheet it is also tied to the specified minimum approved flow for temperature limiting. Do not substitute an outlet or assume that a low-flow option is interchangeable without checking the temperature-limiting conditions for that precise model. For institutional and public installations, also check whether vandal resistance is called for and whether the selected outlet code provides it.
Will it fit the existing sink and supply connections?
The cited 420-T41E2805ABCP product page identifies 4-inch fixed centers and 1/2-inch NPSM supply inlets intended for 3/8-inch or 1/2-inch flexible risers. These are useful starting points for confirming compatibility with a lavatory and supply setup, but they do not replace a dimensional review of the exact model and installation conditions.
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- Check supply connections. Compare the faucet’s listed 1/2-inch NPSM inlets and supported riser sizes with the existing or specified supply hardware.
- Review the full model drawing and sheet. Confirm dimensions, clearances, finish, outlet, and any project-specific accessories against current documentation for the exact part number.
- Validate system conditions. For the T45ABCP, compare actual pressure and hot-inlet temperature with the sheet’s stated 20–125 PSI and 100°F–180°F operating ranges. Use the relevant sheet for other models.
A match on center spacing alone does not prove that the faucet is a suitable replacement. Connection type, flow, operating limits, outlet configuration, and the required protection feature also need to line up.
These connection details are documented for the cited T41 model, so verify the exact model sheet before applying them to another T41 or T45 option. In a replacement project, check the faucet mounting and supply interface together; an apparently compatible 4-inch layout does not establish that the risers, clearances, or operating conditions will match. Keeping the full part number attached to the submittal helps the contractor and facilities team check the same configuration.
Which certifications and warranty terms are documented?
The 420-T45ABCP product sheet lists ASSE 1070, ASME A112.1070, and CSA B125.70 for the temperature-limiting feature. It also lists ASME A112.18.1/CSA B125.1, ADA ANSI/ICC A117.1, NSF/ANSI/CAN 61 (Q ≤ 1), and NSF/ANSI/CAN 372. These are claims documented for the T45ABCP sheet, not a blanket certification list for every 420 Series model.
That sheet lists a 5-year limited faucet warranty, a 1-year limited cartridge warranty, and a 1-year limited finish warranty. Warranty terms can depend on model and current manufacturer documentation, so check the applicable document and conditions before relying on those periods for a project or maintenance plan.
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For a specification or compliance file, retain the current sheet for the exact submitted part number rather than copying a certification or warranty list from a related model. This is especially important when a supplier proposes a substitution: ask for the substitute’s own certification and warranty documentation and compare it with the project’s stated requirements. The listed warranty periods describe the T45ABCP sheet; they should not be generalized to every faucet in the family.
How should you specify or order the right model?
Begin with the performance and installation requirements, then match them to a complete model number. A clear specification prevents the common mistake of ordering an unprotected 420 variant when the requirement is specifically for built-in scald protection.
- State that built-in scald protection is required. Identify a 420-T configuration rather than saying only “420 Series.”
- Name the exact configuration. Distinguish T41 from T45 and include the full part number, including the outlet and finish codes where applicable.
- Set the temperature and flow criteria. Compare the project’s required maximum outlet temperature and flow to the exact model sheet. T41 and T45 documentation gives different limits, and outlet choices vary.
- Check installation interfaces. Verify 4-inch fixed centers where applicable, supply-inlet compatibility, pressure, hot-inlet temperature, and physical clearances.
- Confirm compliance documents and warranty. Request current model-specific certification and warranty materials for the selected part number.
- Reconfirm before purchase or substitution. Product configurations and availability may change. If a quoted model is substituted, repeat the temperature, flow, connection, and certification checks rather than assuming equivalence.
For repair rather than full replacement, the manufacturer lists 420-X41KJKABNF as a thermostatic ceramic cartridge with built-in check valve. Check the installed faucet’s exact model and the current parts listing before ordering; a similar family name by itself does not establish fit.
Budget and lead time should be checked at the point of purchase as well. Chicago Faucets’ product page for 420-T41E2805ABCP showed a manufacturer list price of $444.37 and reported shipping five business days after order acknowledgement. Those are page-specific figures, not a dealer quote, guaranteed inventory, or promise that another model will cost or ship the same way. Confirm the current listing and ask the dealer about the exact model’s price and availability before making a purchasing decision.
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Chicago Faucets directs buyers to dealers for purchasing assistance. A dealer can help confirm whether the requested outlet, finish, and connection configuration is available, but the quote should still identify the complete model number. If using a shopping link or merchant listing, match it to the full specified part number; a similar series description is not enough to establish that the offered faucet is the protected configuration.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is the key takeaway for contractors and facilities teams?
The 420 Series offers a scald-protection option, not universal protection across the whole series. Specify a complete 420-T model, then verify its own flow, maximum outlet temperature, operating limits, connections, certifications, and warranty. For a low-flow application or a temperature-specific requirement, those model-level details are decisive—not just the “420” name.
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Frequently Asked Questions
Can I identify a protected faucet from the 420 Series name alone?
No. Ask for the complete part number and the current model sheet. A quote that says only “420 Series” does not establish which cartridge or outlet configuration is included.
Does ASSE 1070 certification mean the same outlet temperature applies to every 420-T model?
No. The documentation gives different maximum outlet temperatures for T41 and T45 configurations, and the exact model sheet controls. Certification and a temperature setting are related but distinct specification details.
Can I replace a 420-T cartridge without replacing the faucet?
The manufacturer catalogs a thermostatic replacement cartridge, 420-X41KJKABNF, but compatibility should be matched to the faucet already installed. Record the full faucet model and check the current parts documentation before ordering.
What should I request if a supplier proposes a substitute model?
Request the substitute’s complete model number, current specification sheet, and certification documentation. Compare its temperature limit, approved flow range, connections, and operating limits with the project requirements before accepting it.
What is the documented price and shipping time for a 420-T41E2805ABCP?
Chicago Faucets’ product page showed a $444.37 manufacturer list price and shipping five business days after order acknowledgement. These figures can change and do not guarantee dealer pricing or stock, so confirm current terms for the exact model.
The Bottom Line
Bottom line: Choose by complete model number, not by the 420 Series name alone. The T41 and T45 configurations have different documented temperature limits and outlet choices, while the T45ABCP sheet also specifies operating ranges and a minimum approved flow for temperature limiting. Verify fit, certifications, warranty, price, and availability against the current documentation for the exact faucet before approving a purchase or substitution.
