Will this fit on a Regency hand wash sink?

Yes; it is very easy to install;,and very well built

How can I purchase the garden hose adapter?

I ordered one from Amazon (cut and paste below description into Amazon search bar). 3/4" Female Hose x 55/64" Male Chrome-Plated Brass Laundry Faucet Adapter ($6.00).

what is the protocol for cleaning this? Thanks

Recommend monthly operation for at least one continuous minute.

What are the red things for?

Those are the caps--they are shown off so that the eye wash does what it's supposed to and emit a stream of water that one can put their eyes into. When those nozzles are capped & the faucet is in the right position, water doesn't come out.

ASIN	B07DTKQ63M
Best Sellers Rank	#119,391 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #66 in Eye Wash Units
Date First Available	June 29, 2018
Is Discontinued By Manufacturer	No
Item Weight	1.2 pounds
Item model number	SF-FME10
Manufacturer	SmarterFresh
Product Dimensions	8 x 5 x 3.5 inches

Faucet Mounted Eyewash Station – Reliable First AID Emergency Eye Wash Unit for Sink Attachment – Sink Mount Eye Flush Shower for Eyes and Skin

Description

Specifications

Common Questions