Hansgrohe Plumbing - Recent Questions, Troubleshooting & Support

I would suggest that if the low flow is affecting the hot water only that the filter is restricted where the tap plumbing joins the house plumbing. The filter is in a small housing which is right next to the house plumbing. Turn off the hot water supply and ensure the mixer is in the off position. Disconnect the hose adjacent to the house plumbing using a 19mm and also a 10mm spanner to stop the thin hose twisting. Then use a 13mm spanner to unscrew the filter housing.

Almost certainly the hose. They leak from the bottom, cartridges drip from the top. That unit is discontinued. https://www.manualslib.com/manual/13802/Hans-Grohe-35807801.html https://www.google.com/search?q=Hans+Grohe+35807801+kitchen+faucet+parts ..

Yes you need to replace as a complete Cartridge Repair Kit. Once they wear, you can't fiddle with them and make them better.

identify the source from hot or from cold or from both. cold only suggests you may have a rusty water service supply pipe. this pipe is outside underground. hot would indicate corrosion at your water tou may have a copper system but it;sheater. both hot and cold would possibly indicate galvanized nipples were used to stub out of the wall under your sink, and are experiencing ionic transfer...or electrolysis...if its your bathtub you are talking about and not your sink faucet,,,,the color is very common and is occurring because your tub spout and showerhead were piped with galvanized pipe. a lot of plumbing shops pre-fab their tub valves with galvanized pipe and supply the valve water with copper tubing....just grin and bear it if so. one more idea if it is your faucet and it occurs on both hot and cold use...check the screen in your faucet aerator...the little chrome (or brass) tip that screws on and off the end of the spout on the faucet. good luck and if you see corrosion on any supply connections...handle with care...the pipe or fitting could be very brittle or soft...and break apart...causing a flood....make sure to know where and how to turn your house water supply off before going beyond a visual inspection of your plumbing..orange water indicates corrosion of steel pipe 99% of the time and bkue water indicates corrosion of copper pipe 99% of the time.

That sounds like an issue with your either The cartridge or your handle needs to be reseated correctly . Turn off your water turn the tap to the on position find a set screw should be a small Allen key before turning out make sure your drain is plugged in case the set screws falls all the way out loosen your set screw till it’s almost all the way out remove your handle check to see if your Handle possibly had not been seated correctly. There are YouTube videos to show you how to reseat your handle properly it’s not that difficult. If it’s not a handle issue your cartridge likely needs to be replaced which is also an easy process .

https://spares.hansgrohe.com/etk/INT/product/04076000/8809627168611.seam?fsid=0x000077210000704100006F91&lang=en_GB&wcms=INT https://assets.hansgrohe.com/mam/celum/celum_assets/16__hruh0765_pdf.pdf?5&_ga=2.43849249.583112013.1552939079-215678084.1552939079 The faucet is rated at 6.7L/minute (<2 gal/m) and I would expect that's a design of the cartridge. You could measure flow with spray head attached, then remove head (see link) and measure again to see how much the head reduces rate of flow. You could try removing the check valve(s) but not sure if that will work as it may leak. product features · consists of: single lever kitchen mixer · swivel range 150° · with telescopic function (330 - 500 mm) · normal and spray jet · lockable shower spray, spray returns through pressing spray diverter · quick connect shower hose · flow rate 6.7 l/min · ceramic cartridge · connection type: G ? compression · integrated non-return valve · suitable for continuous flow water heaters

Contact Grohe about a repcement. Looks to be defective.

Loosen the faucet and rotate it away from the window sill until the handle clears.

NPT and NPS are the same. Screw away! If your female thread is plastic and your male thread is metal, you must be careful not to overtighten as overtightening can crack the plastic on the female thread. Good luck, and don't forget your teflon tape. 4 to 5 wraps is good unless you have heavy duty gas piping teflon, then use less.

Check your cartridge and seat if your not sure what they are you can you tube it I'm sure there would be a video explaining how to change them. It is not very difficult.

Usually the aeratorscreen has to be removed and cleaned.

According to FixYa.com: " This is most likely debris in the aerator, filter screen or check valve in the hand sprayer of the faucet. Try removing the hand sprayer and checking the filter screen at the end of the hose. The try removing the check valve to ensure it is clear of debris. It is the yellow ring with the white plastic flap in the middle. You can simply push in on the white flap and hook the yellow ring with a cork screw. Then pull it straight out. You may want to cover the drain with a dish cloth while doing this to keep small parts from being lost. I'm Harvey the Master Plumber.You want to know if you can fix a sudden low volume /pressure delivery problem on an American Standard model AS4205100 H7, one hole / single lever with pullout spray And is it fixable by owner?Yes and maybe! All plumbing systems are plauged with debrie buildup. Every time you turn on a faucet the water starts moving and will bring bits of debrie up from the water main or well. Most are small and will pass through to be caught by the screen in the aireator. Sometimes a relatively large piece comes along and dosen't make it through to the screen. It is stuck in the body of the valve. Fixing takes a little mechanical ability. First, turn off the water to the faucet in question. Then carefully disasemble paying close attention to the order of disasembly so you can reverse the order when putting back together. As each part is removed inspect it for that troublesome bit. I find that a little bit of wire or a paper clip is helpfull. Carefully reasemble. If the volume is still low then you missed finding that bit. Try again or call in a local pro.
It could be one of two problems, one simple, one serious.

1. Turn off hot water angle stop under sink to faucet.
2. Remove supply line from hot angle stop.
3. Place end of supply line in a small bucket to catch some water.
4. Turn on cold water for a couple of seconds and backflush debris from faucet.
5. Reconnect supply line.
6. Turn on angle stop and test

• Complex fix

If you have steel pipes you may be experiencing reduced flow due to corrosion in your pipes. Reduced hot water pressure in the kitchen faucet is usually the first sign since this is the faucet that is most used in the home. Repiping is a job for a professional. Another symptom you may need a repipe is orange colored or rusty water.

It's the water pressure going through a small opening. Possibly some debris in the inlet.

remove the screen and clean it or leave it out,if that don't work youll need to add an inline pressure increase pump,

This is most likely a cartridge that has worn out and needs to be replaced. Most of the kitchen faucets use cartridge number 92730000. This is available through your local dealer or online dealer. If you need further help feel free to contact me at Hansgrohe 1-800-334-0455. Press 2 for tech and ask for David Scarborough.

If you had a professional install it, they messed-up. Call them back to re-do the installation.

It took me less then 1 minute to find it after wasting time reading your question. you could also try contacting....ummm...hansgrohe directly...maybe they will have your part since they make your faucet...1-800-344-0455. Do a little searching before posting next time. for further convenience, you can purchase one at this link also. https://www.guyplumbing.com/index.php/linecards/hansgroheparts/hansgrohe-nylon-spray-hose-5836.html PS. your searching for the OLD part number. the new one is

97735000

tighten the screw inside the head