APP-ÖZL/DVG

Wall Couplings

Products / Engineered Fittings

Safe and Leak-Tight Solution for Wall and Structural Penetrations

APP Type Wall Penetration Units are designed to ensure the safe passage of pipelines through concrete walls and structural elements. With optional adaptor-ended connections, they are compatible with all types of pipes, minimizing the need for additional components. They provide both leak-tight sealing and structural integrity, protecting both the pipeline and the building structure.

KEY ADVANTAGES

  • Wall penetration solution without the need for additional fittings
  • Absorbs angular deviations up to 6° and accommodates ground movement
  • Expansion and contraction tolerance up to 10 mm
  • Full compatibility with various pipe materials (Ductile iron, Cast iron, AC, PVC, PE, GRP, etc.)
  • Safe application in wall and concrete penetrations
  • Special design ensuring leak-tight sealing
  • Protective barrier between pipeline and structure
  • Cost-effective solution reducing stock variety
Download Product Data Sheet Download Installation Instructions Download Size Chart
  • Inlet and outlet connections of potable water reservoirs
  • Wall penetrations in treatment plant structures
  • Pump station sumps and chambers
  • Hydraulic structures in dams and irrigation systems
  • Foundation penetrations in industrial facilities
  • Valve chambers and flow meter manholes

This instruction has been prepared for the correct and safe installation of wide tolerance Wall Couplings designed to ensure leak-proof and secure passage of pipelines through concrete walls, structures, and civil elements.

  1. Pre-Installation Preparation
  • Product Verification:
    Check the label information (DN size and tolerance range) and ensure compatibility with the pipe outer diameter.
  • Positioning:
    Determine the exact installation coordinates (centerline/axis dimensions) according to project drawings.
  • Surface Check (Sealing Collar):
    Ensure that the sealing collar (puddle flange) located on the central body is clean, dry, and free of oil.
    Proper bonding between concrete and this surface is critical for watertight performance.
  • Reinforcement Compatibility:
    Verify that the unit fits within reinforcement bars without interfering with structural elements.
  1. Installation Procedure

2.1 Fixing Before Concreting

  • Place the wall penetration unit between formworks.
  • Ensure both ends are perpendicular and properly aligned with the form surfaces.
  • Important:
    Secure the unit to reinforcement using wire ties to prevent movement during concrete pouring.

2.2 Protection Measures

  • Seal both ends of the unit with plastic caps or tape to prevent concrete ingress.
  • For flanged types, protect bolt holes and threads from concrete contamination.

2.3 Concrete Pouring & Vibration

  • During pouring, ensure no air voids remain beneath or around the unit.
  • Apply vibration carefully to allow proper concrete compaction.
  • Warning:
    Do not allow the vibrator head to directly hit the unit.

2.4 Formwork Removal & Cleaning

  • After concrete curing and formwork removal:
    • Remove protective caps
    • Clean internal surfaces and flange faces
    • Remove any concrete residues completely
  1. Important Notes
  • Axial Alignment:
    Misalignment during installation may prevent proper flange matching in later stages.
    Use a spirit level to ensure correct alignment.
  • Thermal Expansion:
    For long units, consider using flexible connections to accommodate expansion differences between steel and concrete.
  • Leak Testing:
    Do not subject the structure to full water pressure before the concrete has fully cured.

No

Component Name

Material and Technical Details

1

Wall Penetration Pipe

ST 37 Carbon Steel. High-strength structural body.

2

End Rings

Ductile Iron (GGG40/50) / ST 37 Steel. Pressure end caps applying force to the gasket.

3

Flanges

ST 37 Steel. Compatible with various flange standards

4

Tee Bolts/Bolts

Zinc-Coated Grade 8.8 Steel / AISI 304 / 316 Stainless Steel. High corrosion resistance.

5

Conical Gasket

EPDM / NBR. Pressure-responsive sealing technology.

6

Nuts and Washers

Zinc-Coated Grade 8.8 Steel / AISI 304 / 316 Stainless Steel. Secure locking system.

7

Coating

Epoxy / Thermoplastic. Long-lasting protection and durability.
  COUPLİNG SIDE FLANGE SIDE
REFERENCE DIAMETER (mm) APP CODE COMPATIBLE PIPE TYPES (mm) FLANGE SIZE (mm.) PN10  PN16 PN16
BOLT BOLT BOLT
SIZE QUANTITY SIZE QUANTITY SIZE QUANTITY
50 APP 50 50 Steel, 63 HDPE, 63 PVC 50 M16 4 M16 4 M16 4
80 APP 80/1 80 AÇB (PN 10), 80 Steel, 90 PVC, 90 HDPE, 80 Ductile, 80 CI 80 M16 8 M16 8 M16 8
APP 80/2 80 AÇB (PN 10), 110 PVC, 110 HDPE 
100 APP 100 110 PVC, 110 HDPE, 100 AÇB (PN 10), 100 CI, 100 Steel, 100 Ductile 100 M16 8 M16 8 M20 8
125 APP 125 125 AÇB (PN 10), 140 PVC, 140 HDPE, 125 Steel, 125 CI, 125 Ductile 125 M16 8 M16 8 M24 8
150 APP 150/1 160 PVC, 160 HDPE, 150 Steel 150 M20 8 M20 8 M24 8
APP 150/2 160 PVC, 160 HDPE, 180 PVC, 180 HDPE, 150 Steel, 150 CI, 150 Ductile, 150 AÇB (PN 10)
APP 150/3 150 AÇB (PN 12,5), PN12,5, 200 HDPE, 200 PVC
175 APP 175 175 AÇB (PN 10), 200 Steel              
200 APP 200/1 225 PVC, 225 HDPE, 200 Steel, 200 Ductile 200 M20 8 M20 12 M24 12
APP 200/2 200 AÇB (PN10), 225 PVC, 225 HDPE, 200 Ductile, 200 CI
APP 200/3 200 AÇB, (PN 12,5) PN 12,5, 250 PVC, 250 HDPE
250 APP 250/1 250 Ductile, 250 Steel, 250 CI 250 M20 12 M24 12 M27 12
APP 250/2 250 AÇB (PN 10), 280 PVC, 280 HDPE
APP 250/3 250 AÇB (PN 12,5)
300 APP 300/1 315 PVC, 315 HDPE, 300 CI, 300 Steel, 300 Ductile 300 M20 12 M24 12 M27 16
APP 300/2 300 Ductile, 300 AÇB (PN 5)
APP 300/3 300 AÇB (PN 10), 355 PVC, 355 HDPE, 350 Steel
350 APP 350/1 300 AÇB (PN12,5), 350 Ductile, 350 CI, AÇB (PN 15) 350 M20 16 M24 16 M30 16
APP 350/2 350 AÇB (PN 10), 400 PVC, 400 HDPE, 400 Steel
400 APP 400/1 400 Ductile, 400 CI, 400 GRP 400 M24 16 M27 16 M33 16
APP 400/2 400 AÇB (PN 10), 450 PVC, 450 HDPE, 450 Steel
500 APP 500/1 500 Steel, 500 HDPE, 500 PVC, 450 AÇB (PN 10) 500 M24 20 M30 20    
APP 500/2 500 Ductile, 500 CI, 500 GRP
APP 500/3 500 AÇB (PN 10), 560 PVC, 560 HDPE
600 APP 600/1 600 Steel, 500 AÇB (PN15) 600 M27 20 M33 20    
APP 600/2 600 Ductile, 600 CI, 630 PVC, 630 HDPE, 600 GRP
APP 600/3 600 AÇB (PN 10), 600 AÇB (PN12,5)
700 APP 700 AÇB, Steel, Ductile, GRP, PE, CI 700 M27 24 M33 24    
800 APP 800 AÇB, Steel, Ductile, GRP, PE, CI 800 M30 24 M36 24    
900 APP 900 AÇB, Steel, Ductile, GRP, PE, CI 900 M30 28 M36 28    
1000 APP 1000 AÇB, Steel, Ductile, GRP, PE, CI 1000 M33 28 M39 28    
1200 APP 1200 Steel, Ductile, GRP, PE 1200 M36 32 M45 32    
1400 APP 1400 Steel, Ductile, GRP, PE 1400 M39 36 M45 36    
1600 APP 1600 Steel, Ductile, GRP, PE 1600 M45 40 M52 40    
1600-3400 APP1600-3400 Steel, Ductile, GRP              
Please specify the length and model number when ordering:
                                        1. Model: Both ends with adapters
                                        2. Model: One end with adapter, one end with flange
                                        3. Model: Both ends with flanges
Please specify the pressure classes of the flanges when ordering.
Custom production is available for pipe diameters not listed.
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