Metex - Ratwall For 110mm/4" Pipe. Made From Robust, Corrosion Resistant Stainless Steel With A One Way Valve & Flap. This Rat Blocker For Drains Is Easy To Install By Hand Or At Street Level

Easy to fit but care needed that the drain is a straight piece otherwise may be difficult for a corner

Positives; it’s well made, hinge design is good in that it is largely external to the pipe when fitted so doesn’t reduce its bore, and the nut tightening mechanism to fit it works well. Sizeable metal ‘stop’ prevents loss down the sewer if it comes loose. Negative; CHECK YOUR INSPECTION CHAMBER before ordering- I discovered that the inflows and outflow pipes all had significant overhangs of the brick walls above them ,which meant I couldn’t use the fitting rod from the surface to place the rat wall. Fortunately a bucket of caustic soda/water mix poured over the inside of the chamber carefully and then a rinse off with a hose made getting down there to place the rat wall and manually adjust the nut a lot less unpleasant!

The device is overpriced and does not work properly when reversing the flap for an outlet. Firstly, I wanted to fit to the sewer inlet pipe, however because the sewer half pipe wasn't perfectly aligned with the inlet pipe, it would not slide in no matter how hard I tried. So I had to reverse the flap and fit to the offending outlet pipe. But when tested the flap kept getting stuck open. On further investigation, I noticed that there were sharp points around the flap that were catching on the housing. I had to dismantle the device, file off the sharp points and reassemble, and then it worked fine. Unfortunately I had to buy and modify a second device as we have two outlets from the house. Over £200 spent so hopefully this will stop any rats getting up the soil stack and eating through the toilet connector pipe. Edit: 2/12/19 Just added a photo showing what a rat did to the toilet flexi connector in our ensuite, and why I had to do whatever it takes to stop it happening again!

This really does the job. Good quality , very flexible strong steel and the flap is well fitted so as not to cause blockages. It was very easy to install. I fitted mine using the nut provided but I think I will purchase the fitting pole for future needs to avoid putting hand into the murky depths. It is just the job. Only downside I can see is the ridiculous price , it can’t ever be described as value for money.

Easy to fit but tricky to secure in the pipes - it's designed like a spring to hold in place

All good so far, no issues to report. Been fitted for a Month, bought 2 of them so cover both areas needed. The main criticism is the price of these, when you take them out the box you do wonder about the cost, however it is I suppose a price worth paying given the other option...! Definitely something worth having.

This is a no nonsense product. It uses good materials where required, and has a simple effective design without any silly design mistakes. It installs simply and is extremely firm once installed. If you are having problems with rats in the UK, it is highly probable that they are Norway rats, and these almost always come from the drains, not complicated wall climbing or invasion through exterior holes. This simply isn't how the Norway rats operate. I wasted so much time and effort looking elsewhere when I should have been looking at the drains. This has been 100% effective.

When I looked up the reviews this looked worth the money but having received it I'm really disappointed, although it may surve the purpose but I certainly do not think it is worth the price being charged, even it has been laser cut etc. There are others on tge market at half the price & very similar in design I wish I had chosen one of them before fitting it. Let's see if it does the job & how long it lasts???

hatte immer wieder ratten in unserem kanal/revisions-schacht ,anfangs rattengift benutzt,was auch nützte,jedoch nach ein paar monaten wieder neue ratten aus dem strassenkanal "zugelaufen...." ,habe dann die rattenklappe gekauf und eingebaut(rohrablauf richtung strassenkanal,glasiertes tonrohr DN150/150mm),anfangs dachte ich das sich die ratten an den seiten doch irgendwie "durchmogeln" könnten,aber seit dem einbau keine ratten mehr im schacht,der einbau selbst ging ganz einfach innerhalb weniger minuten.......

Es wurde auch beim zweiten Versuch nicht die 150 Variante, sondern die Kleinere zugeschickt. Das ist sehr schade, denn es ist der beste Rattenblocker, den ich in der Hand hatte