(1)Q: It states push/pull nozzle so does it compact or is it always hanging like this when attached to faucet?
A: It is always hanging as shown in the picture.
(2)Q: There is no standard thread size for faucets. What is the exact size of the female threads on the inside of the piece that attaches to the kitchen si
A: I would say there IS a standard size for faucets (not the fancy modern ones. But they already have sprayers). So you should have no trouble expecting this to fit an ordinary faucet in the USA, especially if it is anything like the one pictured. This spayer went on mine without any problem. However, to answer your exact question, I don't know. I'm not a professional. Please ask someone at your hardware store. I'm sure they'll reassure you that this will fit because it IS standard. If you have odd DIY pumping or an old farm house with odd plumbing, you should maybe take a picture of it and you measure it so that the plumber or hardware man can tell you the answer. Sorry I couldn't do better for you. Maybe someone else knows the exact size.
(3)Q:how do I install this?
A: Unscrew your old sprayer or aerator and screw this in .
1.The 14cm lengthened catheter 360-Degree full rotating The tap lets you turn the tap in whatever direction you want, Perfect and practical for variety sink activities
2.Easy to use and extensive: Faucet Aerator Can be fitted to kitchen Faucet, Sink Faucet, Bathroom Faucet and Toilet Faucet，And use plenty of water public places,Easy to install and easy to maintain. hard water areas can also be long-term use
3.Easy to clean: Water bubbler contains filter, can be at ease use.
4.Made of high quality ABS material with chrome plated finish processing, anti-corrosion and rust-resistant, durable and safe to use.
5.Use plenty of water public places,Easy to install and easy to maintain.to scratches; Top quality chrome finishes resist corrosion and tarnishing.
1. Adjust the size of the inner ring. If the diameter of the water pipe is large, the inner rubber ring can be pulled out to leave space.
2. Screw the adjustable joint onto the faucet and tighten the screw to fix.
3. Connect the sprayer to faucet joint.
1*Faucet Sprayer (other accessories demo in the picture is not included.)
Please allow 1-2mm errors due to manual measurement. Due to the difference between different monitors, there are color differences, please take the real product as the standard.