American Toilet Parts, Replacement Toilet Parts. Best Toilet Valve on the Market, the Euro Valve, One Soft Rubber Flapper Valve and One Overflow Extension Tube. NuFlush, Best Euro Valve, 3 Extension tubes to improve flush and our soft rubber flapper valve. NuFlush, We make toilets flush better. Our NuFlush soft rubber flapper valve will seat better than and flapper flave on the market. Over flow tube extensions will add more water so you will have to flush once. The more water you can put into your toilet the beter it will flush.