Neoperl 13 0000 5 Standard Flow Cache Perlator HC Aerator, Tom Thumb Size, 2.2 GPM, Aerated Stream, M16.5 x 1 Threads Bundle with Aerator Key (2 Items)

Perfect fit. Replaced a clogged low-flow (1.2 gpm) aerator with a same-size 2.2 gpm aerator. Screwed right in with no issues.

I purchased a Hans Grohe Cento faucet from Costco. Surprise! This faucet splashes water everywhere. Well made except instead of an aerator it uses a laminar flow part made by Neoperl. Hans Grohe does not offer a replacement aerator. Here is how to replace it with the part sold on Amazon. Use the red tool that came with the faucet (likely clipped to the faucet hose) to remove the part from the end of the spray hose. The yellow tool from Neoperl is not needed. Slide the central part out. This is the Tom Thumb sized, Neoperl laminar flow part. Note it is not threaded, unlike the aerator parts offered by Amazon. Prepare two pieces of tape to protect the parts. Use one piece to protect the grey portion, and the other piece to protect the white portion. Using two pairs of pliers gently pull the parts directly away from each other. They will easily snap apart. Do the same with the new aerator. The grey threaded piece and the two small screens on the back of the old part are not needed. Snap the new white part (aerator) onto the grey, unthreaded portion of old part. Reassemble faucet. You will hear the aerator working as it creates a faint hiss not present with the old part. Splashing should be reduced considerably. Note this part, color coded red on the back, is 2.2 gallons per minute and is the maximum flow available. The Cento's anti-siphon check valve is rated at 2.2 gpm maximum. In my case I wanted better flow so I don't have to wait quite so long for hot water to arrive at the faucet.

This size is not carried by any store in my area. After trying every other size, a plumber was able to figure out I needed the Tom Thumb size for my Delta bathroom faucet. Came straight to Amazon, as one does, and found this one. Shipping took a while, 2-3 weeks, but I’m not going to ding them because it worked! Keeping the little ‘wrench’ that was included for future use.

Like the new flow rate, easy install with tool included

This fit perfectly on my Delta Shiloh kitchen faucet. I would have given it 5 stars, but the flow is the same as the OEM one. I was hoping this one would increase the water flow, but it did not. I would have thought the 2.2 GPM would give me much better flow as I replaced my bathroom faucets with 2.2 GPM aerators and it made a big difference. Oh well, I tried. The OEM was either a 1.2 or 1.5 GPM.

Since we have a tankless water heater that is on the other side of the house, the OEM restricted flow (0.9 GPM) aerators on the bathroom faucets meant 2+ minutes to get hot water to these sinks. I know the water supply is strong because with these original aerators removed water flows at 2.5 GPM. So I bought 3 of these because they claimed up to 2.2 GPM. Unfortunately they achieved only ~1.2 GPM. An improvement, but still insufficient.The good news is that (unlike the original aerators) I was able to remove the flow restrictor. See pic. Without the restrictor, water flows at nearly the full 2.5 GPM. I now get hot water to my bathroom faucets in ~45 seconds.

Worked perfect. Needed to swap out on my bathroom. Sinks. Hard water in central texas makes changing these out a necessity every few years if you don't have a water softener installed in your home

This was a perfect fit for our Delta Celice Venetian Bronze (model 25705LF) bathroom faucet with a cached/recessed RP51345 aerator.The old aerator (a 1.2 gpm or 1.5 gpm, not sure which) had slowed to a trickle. After scouring various hardware stores and having no luck at finding a replacement that would fit, I figured I would try my luck here. I'm glad I did. It arrived two days earlier than expected, and cost about seven dollars less than what Delta wanted for a replacement 'low flow' aerator. Will probably buy another here soon, just to have a spare.