Fundo Primo installation

Cut the DN50 pipe even and flush with the subfloor surface. Make sure that the cut out fits to the Fundo base‘s drain. Cut out a 130 mm diameter hole around the DN50 pipe‘s center to allow for the wedi drain to be inserted into the subfloor while the cut out area must remain free of deflection. The drain waste pipe and P-trap have to be safely affixed to and supported by the subfloor structure.

Next, install the Fundo Click and Seal drain unit. Drain components are delivered inserted inside the Drain Body. Please take the parts out and use step by step following our manual here.

Apply the wedi provided safe Lubricant to the black rubber ring inside the wedi Drain Body.

Insert the Drain Body snugly into the receiving mechanism of the Drain Unit on the underside of the Fundo base.

Once inserted, turn the Drain Body clockwise until it “clicks” into final position and you will see the imprinted arrow on drain unit aligning at the base’s click mechanism. This will require no more than a quarter turn. Ensure a tight connection by lightly pulling and pushing on the Drain Body. The Fundo base and its Drain Unit is now ready for installation. Should you want to remove the Drain Body at any time, this can be done by pushing the snap mechanism’s plastic flap inwards using a flat headed screwdriver and while unscrewing the Drain Body to the left at the same time.

On the top side of the drain you can also verify the drain unit has successfully connected when the single hash marks are centered between the double hash marks.

Trowel the tile adhesive and comb through with a 10 × 10 mm notch trowel. Channels pointing to the entrance.

Trowel the tile adhesive on the rear side of the Fundo again using a 10 × 10 mm notch trowel. There are different ways to ensure good bond of the wedi base to the subfloor. Applying tile adhesive on both, wedi base and subfloor, is a best practice recommended to achieve full surface coverage adhesion.

Press the Fundo firmly into the tile adhesive bed, ensuring that the installation is level and void free. Apply some weight equally and leave on surface and drain area to allow the tile adhesive to initially cure without being disturbed (e.g. tile adhesive bags). Do NOT step on the drain module to push/connect to drain body or tile adhesive. Ensure there is 100 % tile adhesive supporting the drain channel area over a completely flat subfloor.

Apply wedi provided safe Lubricant to the Rubber Sealing Gasket and insert the Rubber Sealing Gasket between the wedi Drain Unit‘s interior and the outside of the DN50 waste pipe in the floor. Push the Rubber Sealing Gasket down along the waste pipe until it is stopped by the Drain Unit‘s lower interior flange.

Apply wedi provided safe Lubricant to the rubber part of the Compression Spacer. With the rubberized part pointing up now insert the Compression Spacer in between Drain Unit and waste pipe and on top of the Sealing Gasket. The Compression Spacer will push the Rubber Sealing Gasket down into its resting position.

Insert the Locking Nut with notched side up into the threaded part of the Drain Unit opening and screw down until Locking Nut top is flush with top edge of Drain Unit‘s threaded part. Important: Turn Locking Nut to LEFT to insert and screw into flush position (turn Counter-Clockwise).

Insert Strainer Key into Locking Nut at notch connections and with Strainer Key printed side up. The Strainer Key is used as a tool to tighten the compression seal of the Drain Unit, but remains in place later to serve as a hair catcher to protect the drain and make maintenance and cleaning easy.

Insert a flat headed screwdriver into Strainer Key slit and turn LEFT to tighten the compression seal (turn Counter-Clockwise). Achieve a hand-tight fit and do not over-tighten.

Set up a continuous 10 mm bead of wedi 610 adhesive sealant along the pans channel on the outer perimeter and only in areas where you can immediately install a building board into the fresh sealant.

Push the wedi board all the way into the channel of the shower base channel and its bead of sealant. Smooth out any pushed out sealant on inside seam using a putty knife. Fasten the boards directly to the studs starting 300 mm above the base and at a rate of 1 fastener per 300 mm. One extra fastener is set into the seam to the next board to create a flush transition.

Apply continuous 10 mm beads of sealant between all connections of boards and install with thigthly butted seams. Excess sealant must be spread flat with a putty knife. All seams and fastener heads in the assembly are covered with a secondary 10 mm bead of sealant and spread flat. The seams should be covered 25 mm on either side of seam. All fastener/washers are covered with sealant stretching 25 mm over the washer edges.

wedi Niches are installed in a cut out in the wedi wall and attached with it‘s flange right into the center of 450 mm studs. wedi 610 adhesive sealant is set along the connection of wall to niche.

2 Fasteners each side of the niche are set to create a flush transition to the wall boards. Another 10 mm bead of wedi 610 adhesive sealant is spread over fasteners and seams.

A continuous 10 mm bead of sealant is set into the channel and along the vertical hob notch part. A circle of 10 mm sealant bead is set against the wall boards where the hob attaches. There are various different ways to waterproof the bathroom floor with wedi. The most common way is to use one of our boards in the thickness from 4mm to 50mm. Here apply the tile adhesive to the Substrate. Then apply a continious 10mm bead of sealant into the channel of the Shower base including on the channel of the wedi board used for the bathroom floor that connect to the wedi Shower Base.

Immediately spread flat all excess sealant with a putty knife. All seams and fastener heads are covered with a secondary 10 mm bead of sealant and spread flat. The seams should be covered 25 mm on either side of seam. All fastener/washers are covered with sealant stretching 25 mm over the washer

You can now insert the drain cover unit consisting of a stainless steel frame and the stainless steel cover itself. The drain cover unit fits in loosely and the drain installation is complete.