GROHE47995000 Pressure Balance Cartridge

Turns out it was not the cartridge leaking – it was mineral deposits and or corrosion where the Orings of the cartridge seat on the brass valve body!After installing a new 47995000 cartridge the leak continued. At this point I looked closer at the brass valve body and realized that there were mineral deposits on and around near the inlet surface where the Orings of the cartridge mate/seal, allowing water to pass. After using a coarse and then a finer Scotch Brite pad to thoroughly clean this brass surface, the new cartridge was reinstalled and success! I then reinstalled the original cartridge and surprise – no leaks. So before condemning the cartridge be sure the surface on the valve body is free of deposits or corrosion and completely smooth. Guess I now have a spare cartridge just in case.

This broke in less than a year of use and caused the spout to drip/leak. I went directly through the manufacturer for a replacement and my spout is finally fixed. It seems this was a defective product.

Muy bueno

Impressed with quickness of delivery. Works

quality and timely delivery

After installing the new cartridge, I still had leak problems. Turns out the cartridge wasn't defective, but it's correct installation requires lubricating the O-rings at the back of the cartridge, otherwise they will not seat properly. There are no instructions telling you to do this, but Grohe do include a little sachet of plumbers lube in the box. Apparently this prepares the O-ring to seat properly and form a good seal. Barney Wisdom's extremely helpful review entitled "Read this before condemning the cartridge!" saved the day, by explaining how important the seal is and how to address potential problems. I learned about lubricating the seals from Grohe tech support, who were helpful, but I was skeptical that was the actual problem until I saw Barney's explanation in his review. I do fault Grohe for providing no explanation in the box...a little slip of paper would probably forestall MANY tech support calls and frustrated customers!

i bough this product only 9 months ago now , i have to replace it again? this is not acceptable.

Let's face it, this is not a well design valve unit. Like many reviewers here my original valve was leaking after about 4 years of use. I found this unit on Amazon thinking it's direct replacement. I actually bought 2 and both were leaking immediately after installation. The leaking was actually worst then that original unit's leak. I ended up putting my original broken unit back in and it leaked just as bad.So after looking at something of the pictures from other reviewers I can understand how the internal mechanism works. Looks like if you tight too much it will push the disk against the 2 inner O ring thus messing up the seal. I ended up loosen the nut around the valve and it works much better now. Let's see if this new unit will last me another few years. Fingers cross...