How to fit a Grohe mixer tap | 3/8 tap install

I bought this tap in 2021, but was too busy to install it. When I looked at the tap I released the tails were 3/8”BSP, having checked the item on eBay, it should have come with ½”BSP tails. I guess it’s a bit late to complain over a year after the purchase! I hope everyone has a great Sunday 😉

You've taught me so much Chez from plumbing to electrical to all things DIY. I aspire to be someone with the knowledge and skills like yours one day. I am currently at college doing my Electrical Installation Level 3.

Great instruction as usual! i have had this same set in a the back room (unused) for a couple of years and other projects got in the way till the old mixers started leaking.. I checked the fittings beforehand as I wanted to fit some isolators I already had and as your video shoed.. they wouldn't fit these tails.. really appreciate the 3/8 BSP information.. now ordered proper items for picking up on Monday. I now have everything for the job now. I'd be scratching my head otherwise and a stalled job. Grateful.

Nicely done: I liked your method of using the box spanner combined with the ratchet. Like many I've struggled with the hoses wanting to twist during installation, never easy in those cramped spaces under a sink, so the swivel sounds like something I'd look for next time around. BTW: Good to see you back on here :)

Good tip about using a socket & ratchet on the end of the tap spanner! Beats trying to use those silly bars you get with them!

Great video. Your comments about Grohe basin taps were spot-on. Very good quality, but many of them come with 3/8" BSP fittings (apart from their Quickstart, which are 1/2" BSP...confusing, I know), so you need to check the size of the old basin tap fittings and buy the right-sized fitting for the new tap. Check the manufacturer's specifications online. For plumbing DIY-ers unfamiliar with fitting isolation valves, there are two 15mm versions. One end is the usual compression fitting for the 15mm pipe and the other end is a 'male' flat 1/2" or 3/8" thread for the flexipipe fitting.🙂

You did well there faffing about under the sink. I'm not as flexible as I use be so it's always strenuous doing something like this. Still it beats paying top dollar to a plumber. Great demo and instructions 👍👍.

Great video, I’ve done a few taps and the advice you gave about using a ratchet is great, I never thought of that, it would save having to undo waste pipes to get the extensions on the box spanner’s 👍

Great video thanks for sharing. I recently put in Grohe taps, really nice. They came with a free spanner and also with a replacement pop-up waste. I sceptical of the pop-up waste when I first saw it (because the connector it was all plastic) but it has really cool double thread design with no route for water to get to the outer thread, so no pumbers mait needed.

Thank you for the video. Interestingly, last night I have installed one (very similar to this one). In the manual, they suggested to open the tap filter (at the end of the tap), after the installation and run the water for around 2 minutes. And only after, put back the filter on. maybe it is because if something from the factory (metal shavings for example) remained in the pipe, does not damage the filter.

I can’t believe this. I replaced my kitchen tap with a mono block yesterday, mine doesn’t have the threaded bar and brass nut. It had a threaded collar and plastic sleeve that you hand tight. As you say it’s tight especially fighting between a double sink.

Ultimate Handyman Sharing what you know with us is great video Take care and have a great day PRODIGY Ultimate Handyman From Nick Ayivor from London England UK 🇬🇧

I seem to remember you working on this basin before and having some trouble with it?! Nice new tap - hope it is working well.

You can get 1/2" tails to 3/8th" adaptors to pop into ballofix valves, 15mm-1/2" rad unions are useful, but the cost compared with buying in the incorporated 3/8th flat ballofix is around the same (the link you supplied) and less faffing involved. Thanks for the suggestion. Gonna buy a pair in..just in case. BTW, FAF stands for fiddly as f^&k.

Good video. I used to work for reed paper and board in Kent as a fitter/ turner. I bet the mill in Darwin is long gone?

Does the UK still have that odd hot water/cold water split? I remember visiting 12 years ago and finding it weird how the hot water and cold water came from two completely separate chambers.

Can I make another comment? I am not sure if you are aware but it is possible to fit one of these taps from ‘above’ if you put the backing plate on just held by the nut with a few threads you can fiddle the backing plate through the hole. Put one ear of the plate through the hole and rotate and feed it through. Amazingly it works and saves the upside down fiddle.

👍You are number one.👍

Think you took a bit of a risk using old olive without PTFE ...

Could you be lazy and just turn off the current isolation valves, even with the high mains pressure?