The water feature is a custom water basin or "tskubai", which is found in some traditional tea gardens in Japan.
This is not an over the counter WF. The bamboo spout is hand carved and cut to fit a tube which carries recirculated water from the holding basin below the gravel. I do a number of these in the gardens I design. I am happy to make one for you anytime. Best, loubfg@comcast.net