Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: I am looking for fine threads on the house side of the vacuum breaker and the course threads on the hose side. Does this one have that configuration?
Document: I bought this to replace a plastic one that failed (broke) and have not used it yet. This has to better than plastic. If it works with no problems it will get 5 stars. Really can't see how it would fail. I'll update when it's used.
These devices break the vaccuum in a hose so the water can drain out of the faucet. That way you don't have the hose with pressure building up when the hose gets hot from sitting in the sun. Perfect for the job
Bought these as backup spares for RV and at home. We use these on all outside water faucets at home and with RV as we travel. Quality is fine except for some plastic interior parts. As advertised.
This is a good quality valve & and a great price Easy to install looks good. with the set screw it makes it harder for people to remove from the faucet. they are in an RV park.
Screws on tightly with no leaks and seems to be preventing anything from flowing back into the lines. The locking screw to keep it on the line is easy to screw down and keeps it securely attached.
Purchased the solid brass backflow preventer - solid brass construction, is sure to provide years of use - chose this over the similarly priced yet cheaper-quality plastic items available - highly recommended
Excellent brass fittings at a great price!
Bought these for our RV Park (Ana Reservoir RV Park) in Summer Lake Oregon. Need these if you want a safe water system for your customers
Arrived on time, hooked it up to the drip irrigation system fed by the well. Made of brass, so it is long lasting and rugged and hopefully will keep any water from flowing back from the garden into the well.
Answer: no