I purchased this product to replace a previous WP-100. The size of the reservoir is perfect and the performance is excellent. Glad to see you sell replacement parts. My previous WP-100, had a leaky hose and handle asm, thus the new purchase.
Has kept my bridges clean. Have increased pressure to 10 over a few weeks and initially gums were sensitive but now are not. Unit is quite noisy at high pressure setting.
I like using it better than flossing. It would be 5 stars if it had an overpressure relay to stop the pump while paused. I haven't learned to not get water all over while repositioning yet.
I actually bought the WP-462W/WP 462C. Sorry for the mix up. This was recommended by my hygenist. I wish I knew about it sooner. It does a thorough job and makes my mouth feel clean. It is also easy!