Order came quickly as usual. I’ve ordered numerous times. Valveless was not included with the shipment, however they promptly credited my credit card. Best customer service I’ve experienced online hands down
It seems to do it's job and fits the standard tubing just fine. Be careful if you include these in a bigger order, they are just tossed into your shipment box without any packaging. It's very easy to lose track of them. They also don't indicate how to orient them, and since they are tossed loosely into your shipment, there's obviously no packaging to indicate that either.
Works as expected, haven't had any issues with it leaking. Great for the price!
My four port air pump is lower than the sponge filters. My three check valves still remain untested as my water fails to siphon over the top of the tank when turning off the air pump. I question if they are necessary. Three stars because I neither like nor dislike the product.
Feels like quality construction, it doesn't noticably inhibit air flow and they do stop water from siphoning out. I air leak tested 3 of these I am currently using in different conditions for the sake of leaving a review with some data. One had no air leaks, one had a barely detectible air leak, and one had a very noticable air leak. Ultimately the leaks were small and effectively this made no difference in my setups so I won't be looking to replace them and would buy again.
Over $ 49.00
Under $ 49
$ 4.99 Flat Rate