Delta RP51505 Cache Aerator Adaptor to Standard 55/64-Inch - 27 Male Thread

I am very thankful that this adapter is available or I would not have been able to hook up my portable dishwasher to a Delta Faucet. Unscrew the aerator from the Delta faucet; screw this fitting in and now you can fit any standard dishwasher adapter into the faucet. It is sturdy and there are no leaks,

This is not threaded correctly for Delta Bellini faucet (Model No. 11946-SSSD-DST). I wish I had read ALL the reviews before buying this because I missed the one that gave it one star because it did not fit even though the manufacturer claimed it would for all it's faucets with "Cache aerators." I wish I knew the thread pattern for my faucet so I could have known it wouldn't work. However the thread pattern for Bellini cache aerators seems to be a closely guarded secret because it isn't listed on Delta's website, it's installation manual, or anywhere else in it's official literature. ** UPDATE: Delta responded to a custormer service email inquiry that there are two possible threadings, the older one is threaded to M24-1 and the newer one is M21.5x1-6 male. Even the newer instruction booklet for this faucet fails to list the threading or the part number for the aerators. So unless you know the threading of your faucet, it's a crap shoot whether this will fit yours.

Excellent find. Saved me from plumbing headaches. Wasted time and energy going to HD, Lowes and Ace hardware. This saved money, time and energy. Exactly what I was looking for to attach a diverter from Faucet to a filter system. M21.5 to 55/64 Adapter

I have a Delta single-handle faucet in my bathroom that came with an aerator you couldn't just unscrew by hand. You have to use a little black plastic tool that has notches that fit the aerator. I was OK with that at first but my water softener went out and leaked the little tiny gold beads of resin into my water pipes and clogged my aerator at 3:00 am. I was not happy trying to get the notches on the tool to fit the notches on the aerator when I was half asleep and just trying to wash my hands. Thankfully I had put the little tool in the bathroom vanity drawer next to the sink and I eventually got the aerator off. (With lots of bad words.) None of my other faucet aerators clogged with the leaked resin -- only this one. It has a very fine screen. I couldn't get all the resin out of it when I used my waterpik on it. So the next day I went to the hardware store to get a new aerator. It is not a standard size. (I have no idea who thought up this brilliant idea.) I called Delta and got a woman who was very little help. I explained to her that my kitchen faucet is Delta; both shower controls are Delta; and this bathroom faucet is Delta but i don't plan on buying any more Delta faucets if they come with non-standard aerators. You can't use the faucet without an aerator because the water sprays everywhere. She said they would send me a new aerator (which is not what I want -- it'll need the same stinking tool.) So I searched their site for my model number and then searched their repair parts for my faucet (Model 520-DST). I found this part on their site but figured it would take a long time to get it from Delta. So I ordered it from Amazon and it came in a couple of days. This thing is a gray plastic with an o-ring along the circumference to keep it from leaking. I had to put silicone grease on the o-ring to get it to seat properly in the faucet. Then I put a standard female thread aerator on the faucet. It works fine but I am going to go back to the hardware store and see if I can find a low profile aerator because this combination sticks out pretty far. At least I can unscrew the thing at 3:00 am if I need to!

plastic so the threads tear easily - needs to be metal!

Works and fits fine but it should reasonably be assumed to be single or at most a few use because there is no way to remove it when it's tight enough not to leak without destroying it. I finally had to cut notches in it to turn it out which then of course made it no longer seal at the bottom. If they'd just put ridges around the "fat" ring you could actually grip it.

I have a delta faucet installed and it has an annoying recessed internal aerator with an usual size. I was unable to find anything to allow connection to my portable washing machine or PUR filter at Home Depot, or even any idea of what to buy. It took a few months of sporadic googling to find the answer & it's this! Completely plastic & I was afraid to put too much pressure on it; however, there is no leaking after a month of use w the PUR filter so it's not flimsy.

It's ridiculous to have to purchase this flimsy plastic adapter. It works, but it's a pain to thread it on and then take it back off because you need to try other aerators. I've tried four and none are acceptable. This is a pain to work with and the flimsy plastic it threads into is a pain.