Pick a Delta bathroom faucet by your sink holes: the Cassidy 2597LF-MPU for a 4-inch centerset, the Trinsic 559LF-MPU for one hole or three with its included plate, or the Lahara 3538-MPU-DST for a widespread sink. Delta lists a metal pop-up drain and its Lifetime Limited Warranty on all three.
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This guide covers Delta bathroom sink faucets for the three common sink layouts.
Delta bathroom faucets by sink layout
| Faucet | Layout (Delta) | Pick it for |
|---|---|---|
| Delta Cassidy 2597LF-MPU | 3-hole, 4 in. centerset | A traditional look on a standard vanity |
| Delta Trinsic 559LF-MPU | 1 hole, or 3-hole 4 in. with included plate | Modern single-handle style |
| Delta Lahara 3538-MPU-DST | 3-hole, 4 to 16 in. | Two-handle widespread look, DIAMOND Seal |
All three include a metal pop-up drain, are WaterSense labeled, and carry Delta’s Lifetime Limited Warranty, according to Delta. Pick by your sink holes first: three holes 4 inches apart is a centerset, three holes spread wider is widespread, and one hole needs a single-handle faucet.
Delta Cassidy 2597LF-MPU: traditional centerset
Choose the Delta Cassidy 2597LF-MPU for a classic two-handle look on a standard 4-inch vanity sink. Delta lists (deltafaucet.com) a two-handle centerset faucet for 3-hole, 4-inch installation, a high-arc spout, a metal pop-up drain, ADA compliance, WaterSense labeling that Delta says uses at least 20 percent less water than the industry standard, NSF/ANSI 61 certification and Delta’s Lifetime Limited Warranty.
On October 15, 2026, the standard new offer sold by Amazon.com showed seven left with model 2597LF-MPU in chrome.
Check Delta Cassidy 2597LF-MPU centerset bathroom faucet on Amazon →
Delta Trinsic 559LF-MPU: modern single hole
Choose the Delta Trinsic 559LF-MPU for a clean, modern single-handle faucet. Delta lists (deltafaucet.com) installation in 1 hole or 3-hole 4-inch sinks with the included optional deck plate and gasket, InnoFlex PEX supply lines integrated into the faucet for one less leak point, a ceramic disc valve cartridge Delta says is tested to at least 500,000 uses, a chrome finish Delta says is tested for corrosion resistance to at least twice industry standards, a metal pop-up and WaterSense labeling.
On October 15, 2026, the standard new offer from a third-party seller showed 19 left with model 559LF-MPU in chrome.
Check Delta Trinsic 559LF-MPU single-hole bathroom faucet on Amazon →
Delta Lahara 3538-MPU-DST: widespread with DIAMOND Seal
Choose the Delta Lahara 3538-MPU-DST for a widespread look. Delta lists (deltafaucet.com) a two-handle widespread faucet for 3-hole installation from 4 to 16 inches, DIAMOND Seal technology that Delta says reduces leak points and lasts twice as long as the industry standard of 500,000 cycles, integrated InnoFlex PEX supply lines, a metal pop-up, ADA compliance, WaterSense labeling and certification to NSF/ANSI 61 and 372.
On October 15, 2026, the standard new offer sold by Amazon.com was available to add to the cart with model 3538-MPU-DST in chrome.
Check Delta Lahara 3538-MPU-DST widespread bathroom faucet on Amazon →
What DIAMOND Seal and InnoFlex mean
Delta describes DIAMOND Seal as a patented design that reduces leak points, is less hassle to install, and lasts twice as long as the industry standard of 500,000 cycles. Of the three faucets here, the Lahara 3538-MPU-DST is the DIAMOND Seal model; the DST at the end of the model number marks it.
InnoFlex PEX supply lines are built into the faucet, so you connect them straight to your shutoff valves without buying separate supplies. Delta says this removes one possible leak point. Check that your stops have a 3/8-inch compression outlet, the common size, before you start; our under-sink shutoff valve guide covers replacing old stops.
Measuring your sink holes
Measure from the center of the left hole to the center of the right hole. About 4 inches fits the Cassidy centerset or the Trinsic with its deck plate. Delta lists the Lahara for 4 to 16 inches, which covers standard widespread spacing. A single hole fits the Trinsic without the plate; our single-hole faucet guide covers more options.
Check the deck thickness on Delta’s spec sheet if you have a thick stone top, and look under the sink to make sure there is room for the faucet body and drain.
The metal pop-up drain
All three Delta faucets here include a metal pop-up drain, which replaces a worn plastic one and matches the faucet finish. A pop-up uses a lift rod behind the spout to open and close the stopper. Our pop-up drain guide covers drain types, and our stopper repair guide covers adjusting one that will not seal.
Finish options
Delta sells these collections in more than one finish under different model suffixes; on Amazon, the Trinsic and Lahara also appear in Delta’s brushed-nickel-look stainless and in champagne bronze, and the Trinsic in matte black. Confirm the full model number before ordering and match towel bars and accessories in the same collection and finish. Our brushed nickel, black and gold bathroom faucet guides cover those finishes across brands.
Which Delta should you buy?
Start with the holes in your sink. If you have a standard three-hole vanity with 4-inch spacing and like a traditional look, the Cassidy drops in with the fewest changes. If you want a modern single-handle faucet, the Trinsic fits one hole or covers three with its deck plate, and its integrated supplies make the swap quicker.
If your sink is widespread, or you want separate handles with more space between them, the Lahara is the pick, and it is the one with DIAMOND Seal. Because Delta lists it for 4 to 16 inches, it can also work on some 4-inch sinks, but check the spout and handle layout on Delta’s spec sheet first.
Whichever you choose, write down the full model number with its finish suffix and keep the receipt; Delta backs these faucets with its Lifetime Limited Warranty, so read Delta’s warranty terms for what is covered and who it covers.
Installing a Delta bathroom faucet
Shut off both stops, disconnect the supplies and pop-up rod, remove the old faucet and drain, and clean the deck. Set the new faucet with its gasket or deck plate, tighten it from below, connect the integrated supplies to the stops, install the metal pop-up with the sealant Delta calls for, then run water and check for drips. Remove the aerator and flush the lines for a few seconds before you put it back to clear any debris.
Our faucet installation guide walks through each step.
Delta or another brand?
Moen, Delta and Kohler all offer lifetime limited warranties on residential faucets. Our brand comparison covers the differences, and our Moen and Kohler bathroom faucet guides cover those layouts. For the kitchen, see our Delta kitchen faucet guide.
Frequently asked questions
Which Delta bathroom faucet should I buy?
Match it to your sink: the Cassidy 2597LF-MPU for a 4-inch centerset, the Trinsic 559LF-MPU for one hole (or three with its plate), or the Lahara 3538-MPU-DST for a widespread sink.
What is Delta DIAMOND Seal?
A patented Delta design that Delta says reduces leak points and lasts twice as long as the industry standard; the Lahara 3538-MPU-DST here has it.
Do Delta bathroom faucets include supply lines?
Delta lists integrated InnoFlex PEX supply lines on the Trinsic and Lahara.
Do Delta bathroom faucets include a drain?
Delta lists a metal pop-up drain on all three faucets here.
Will the Lahara fit a 4-inch sink?
Delta lists the Lahara for 3-hole installation from 4 to 16 inches.
How we chose
This document-based guide makes no hands-on testing claim. We read Delta’s product pages for the Cassidy 2597LF-MPU, Trinsic 559LF-MPU and Lahara 3538-MPU-DST. On October 15, 2026, the Cassidy and Lahara offers were sold by Amazon.com and the Trinsic offer came from a third-party seller; all showed stock or add-to-cart availability. Read our selection method and about Plumbing Picks.
Primary sources
- Delta Cassidy 2597LF-MPU (deltafaucet.com): 3-hole 4 in., high-arc, metal pop-up, ADA, WaterSense, NSF 61, warranty.
- Delta Trinsic 559LF-MPU (deltafaucet.com): 1 or 3 holes with plate, InnoFlex supplies, cartridge test, DIAMOND Seal, finish test.
- Delta Lahara 3538-MPU-DST (deltafaucet.com): 4–16 in., DIAMOND Seal, InnoFlex, metal pop-up, NSF 61/372.