For three sprays, pick the Kohler Awaken G110. For a simple single spray, the Awaken G90. For a pause setting, the Delta 52634-15-BG. For H2Okinetic spray, the Delta RP70175-15. For low-pressure homes, the Speakman Reaction S-4000-E15.
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This guide compares five 1.5 gpm shower heads using Kohler, Delta and Speakman documents.
Low-flow shower heads compared (maker documents)
On a phone, swipe or scroll the table sideways to see every column.
| Model | Sprays | Face size | Pause | Finish (linked) |
|---|---|---|---|---|
| Kohler Awaken G110 K-72419-H | 3 | 4-5/16 in. | No | Polished chrome |
| Kohler Awaken G90 K-72416 | 1 | 3-9/16 in. | No | Polished chrome |
| Delta 52634-15-BG | 5 incl. pause | 3-11/16 in. | Yes | Chrome |
| Delta H2Okinetic RP70175-15 | 1 | See sheet | No | Chrome |
| Speakman Reaction S-4000-E15 | 1 | Not listed | No | Dusk blue |
“Low flow” usually means a shower head rated below the 2.5 gpm federal maximum. Every head here is rated at 1.5 gpm and carries the EPA WaterSense label, per its maker. A lower flow uses less water and less hot water per minute. If your concern is weak pressure rather than water use, see our high-pressure shower head guide.
Kohler Awaken G110 K-72419-H: three sprays at 1.5 gpm
Choose the Awaken G110 for three spray modes on a 1.5 gpm head. Kohler’s spec sheet (resources.kohler.com) lists wide coverage, intense drenching and targeted sprays changed with a thumb tab, a MasterClean sprayface that Kohler says withstands mineral buildup, a 1.5 gpm rated maximum flow and a 1/2-inch NPT connection.
It lists a 4-5/16-inch face and a 2-15/16-inch depth, compliance with EPA WaterSense and the 1992 Energy Policy Act, and Kohler’s faucet lifetime limited warranty. On October 15, 2026, the standard new offer sold by Amazon.com showed limited stock with model 72419-H-CP, polished chrome. More in our Kohler shower head guide.
Check Kohler Awaken G110 K-72419-H low-flow shower head on Amazon →
Kohler Awaken G90 K-72416: simple single spray
Choose the Awaken G90 for a compact single-spray 1.5 gpm head. Kohler’s spec sheet (resources.kohler.com) lists a full-coverage spray across a 3-9/16-inch sprayhead, the MasterClean sprayface, a 1.5 gpm rated maximum flow and a 1/2-14 NPT connection, with the shower arm and flange sold separately.
It lists a 2-5/8-inch depth, EPA WaterSense, and four finishes: polished chrome, brushed nickel, matte black and brushed moderne brass. On October 15, 2026, the standard new offer sold by Amazon.com was in stock with model 72416-CP, polished chrome.
Check Kohler Awaken G90 K-72416 low-flow shower head on Amazon →
Delta 52634-15-BG: five settings including pause
Choose the Delta 52634-15-BG for multiple sprays and a pause setting. Delta’s spec sheet (media.deltafaucet.com) lists a 1.5 gpm maximum flow at 80 psi, a standard 1/2-inch pipe fitting, and five settings changed with a dial: full body, fast massage, full spray with massage, high-efficiency spray and pause. Delta notes the pause is a non-positive shut-off, so it slows water to a trickle rather than stopping it fully.
It lists Touch-Clean spray holes, a 3-11/16-inch face, EPA WaterSense, and a lifetime limited warranty on parts and finish for residential buyers. On October 15, 2026, the standard new offer sold by Amazon.com showed limited stock with model 52634-15-BG, chrome. More in our Delta shower head guide.
Check Delta 52634-15-BG low-flow shower head on Amazon →
Delta H2Okinetic RP70175-15: larger single spray
Choose the RP70175-15 for Delta’s H2Okinetic spray at 1.5 gpm. Delta’s water-efficient shower head sheet (media.deltafaucet.com) covers several RP7017x models. It lists the RP70175-15 at a 1.5 gpm maximum flow at 80 psi, with H2Okinetic PowerDrench spray, a standard 1/2-inch fitting and EPA WaterSense.
The same sheet lists 1.75 and 2.0 gpm versions of this head under different suffixes, so check for the “-15” at the end of the model number. The warranty is the same lifetime limited parts and finish warranty as the 52634. On October 15, 2026, the standard new offer sold by Amazon.com showed limited stock with model RP70175-15, chrome.
Check Delta H2Okinetic RP70175-15 low-flow shower head on Amazon →
Speakman Reaction S-4000-E15: built for low pressure
Choose the Reaction for a single pulsating spray Speakman designed for low-pressure homes. Speakman’s product page (speakman.com) describes the S-4000-E15 as a 1.5 gpm single-function shower head with a turbine-powered engine and a transparent dusk blue frame, WaterSense certified, and says it is engineered to perform with low water pressure.
Speakman’s product page also offers a 1.75 gpm variation, so confirm the E15 suffix. On October 15, 2026, the standard new offer sold by Direct Supply Store was in stock with model S-4000-E15. More in our Speakman shower head guide.
Check Speakman Reaction S-4000-E15 low-flow shower head on Amazon →
What 1.5 gpm means
Flow rate is the most water a shower head lets through per minute at a test pressure. Kohler lists 1.5 gpm as its rated maximum flow; Delta lists 1.5 gpm at 80 psi. At lower home pressure the actual flow can be lower. Federal law caps new shower heads at 2.5 gpm, and Kohler’s sheets list the 1992 Energy Policy Act among their standards. Some areas set lower limits; Kohler also lists California Energy Commission compliance for both Awaken heads.
Keeping the spray clean
Low-flow heads push water through small nozzles, so mineral buildup can change the spray over time. The makers address this differently. Kohler lists a MasterClean sprayface on both Awaken heads, which it says withstands mineral buildup and maximizes spray performance. Delta lists Touch-Clean spray holes on the 52634-15-BG. Speakman does not describe a nozzle-cleaning feature on its Reaction page. Kohler also lists its K-23723 faucet cleaner as a recommended accessory. If you have hard water, check our water hardness test kit guide to see how hard it is.
Installing a new shower head
All five heads use a standard 1/2-inch shower arm thread. Remove the old head, clean the arm threads, wrap them with thread seal tape, and hand-tighten the new head, finishing with a wrench over a cloth if needed. See our thread seal tape guide. If the arm is too short or too low, a shower arm extender can help. Kohler sells its Awaken G90 without an arm or flange.
Check these before you order
- Model suffix. “-15” or “E15” marks the 1.5 gpm versions.
- Sprays. One, three or five settings.
- Pause. Only the Delta 52634-15-BG has one.
- Finish. The links are chrome or dusk blue.
- Arm. Not included with the Kohler G90.
- Seller. Speakman via Direct Supply Store.
Which low-flow shower head should you buy?
For three spray modes at 1.5 gpm, the Kohler Awaken G110. For a simple compact single spray, the Kohler Awaken G90. For five settings including pause, the Delta 52634-15-BG. For Delta’s H2Okinetic spray, the RP70175-15. For a head Speakman designed for low-pressure homes, the Speakman Reaction S-4000-E15. For filtered showers, see our shower head filter guide.
Frequently asked questions
What is a low-flow shower head?
A shower head rated below the 2.5 gpm federal maximum; all five here are rated at 1.5 gpm.
Are these WaterSense labeled?
Yes; each maker lists WaterSense for the 1.5 gpm model shown.
Which low-flow head has a pause setting?
The Delta 52634-15-BG.
How do I know I am buying the 1.5 gpm version?
Check the suffix: Delta uses “-15” and Speakman uses “E15” for 1.5 gpm.
Will a low-flow head fit my shower arm?
All five list a standard 1/2-inch connection.
How we chose
This document-based guide makes no hands-on testing claim. We read Kohler’s sheets for the Awaken G110 and G90, Delta’s sheets for the 52634-15-BG and RP7017x series, and Speakman’s product page for the Reaction S-4000-E15. On October 15, 2026, we checked each linked standard new Amazon offer for model, seller, stock and an add-to-cart button. Read our selection method and about Plumbing Picks.
Primary sources
- Kohler K-72419-H spec sheet (resources.kohler.com): Awaken G110.
- Kohler K-72416 spec sheet (resources.kohler.com): Awaken G90.
- Delta 52634-15-BG spec sheet (media.deltafaucet.com): 5-setting.
- Delta RP70172 series spec sheet (media.deltafaucet.com): covers RP70175-15.
- Speakman Reaction product page (speakman.com): S-4000-E15.