Manhole Head 110/32 Stainless Steel 316, A4 inox Stainless for Wells

Manhole Head Size 110/32 Stainless Steel 316, A4

Through manhole head for 110 mm well pipe to 32 mm submersible pump delivery hose.

The well head is a key component of the well system designed to protect the water intake. It provides a hermetic seal, minimizing the risk of water contamination in the well from external factors such as atmospheric debris, groundwater, soil contaminants, and small animals. All these factors can degrade water quality and negatively affect the operation of the deep well. Our head eliminates these risks.

Manhole Head Made of Stainless Steel 1.4404 (316) – a Worthwhile Investment.

Looking for a manhole head that will last many years under harsh underground conditions? Choosing a model made of stainless steel 1.4404 means gaining not only quality but peace of mind for years. Although cheaper alternatives made of steel 1.4301 (304) are available, it is worth paying extra for an acid-resistant stainless steel head. Acid resistance of steel 1.4404 is crucial in underground environments – especially for applications such as deep wells, pipe casings, or water installation components. Here's why:

Why Acid Resistance of Steel 1.4404 Matters Underground?

1. Presence of Aggressive Chemical Compounds in Soil

• Soils and groundwater often contain humic, sulfuric, nitric acids, and organic compounds (from decomposing plants or fertilizers).
• Acidic fermentation products may form in anaerobic conditions.
• Steel 1.4301 (304) does not perform well in contact with such substances — it may quickly develop pitting or crevice corrosion.

➡ Steel 1.4404, due to its molybdenum (Mo) content, shows much better resistance to acids and acidic environments, preventing rapid degradation or perforation.

2. Variability and Chemical Aggressiveness of Groundwater

• Groundwater is not chemically neutral — it can have low pH (acidic), contain chlorides, sulfates, iron ions, and other elements accelerating corrosion.
• In some regions, groundwater pH drops to 5–6, which causes rapid surface damage to ordinary stainless steel (1.4301).

➡ 1.4404 is a "acid-resistant" steel grade that maintains its properties even in low pH water and in the presence of mineral salts.

3. Protection of Installation and Water Quality

• Heads, casings, and well pipes are constantly submerged or damp — their surfaces are exposed to slow but continuous chemical action.

➡ Thanks to its acid resistance, steel 1.4404 preserves material integrity for many years, resulting in:

• no risk of perforation and
• greater operational safety.

Acid resistance of steel 1.4404 is not just a technical parameter – it is real protection against the destructive effects of the underground environment. Where other steels fail, 1.4404 ensures reliability, durability, and installation purity.

If your installation operates underground or underwater – choosing steel 1.4404 guarantees peace of mind for many years.

Specifications:

✅ Material: Highest quality stainless steel 1.4404 / 316.

✅ Seal: SBR.

✅ A2 screws, safety cable eyelet: stainless steel A4 (316).

✅ Cable gland for 6-12 mm diameter cable.

✅ Technical plug.

✅ Thread connection protectors: plastic.

✅ Max suspended load: 180 kg

✔️ Choose additional protective caps for nuts in our store – these further protect threaded connections. Protecting threaded connections is especially important against solid contaminants inside the well casing. Hex nuts reduce issues related to screw head damage or the need to clean Allen screw sockets during head disassembly for servicing.

✔️ The gasket used in this head is designed to perfectly fit both the well pipe and the submersible pump delivery hose, ensuring a hermetic well seal. Proper sealing parameters ensure the head is firmly seated on the pipe – the gasket does not push the head off the well pipe when tightening screws.

✔️ The manhole head includes a cable gland for submersible pump cables with diameter 6-12 mm. Our glands are equipped with a cable seal, and sealing under the gland ensures a tight threaded connection.

✔️ The additional technical plug has an integrated tight sealing lip. The plug design prevents contaminants from entering. The plug can be unscrewed using a screwdriver, socket wrench, or by hand.

The plug provides access to the deep well without removing the head.

Installation Information:

This head fits a well pipe with an outer diameter of 110 mm marked PN 10 - max wall thickness 5.4 mm

WE ALSO OFFER HEADS FOR THICKER WALLS (PN 12.5, PN 16).

Preparing the mounting area:

✅Ensure the manhole head mounting area is properly prepared:

✔️ Install the head on the pipe barrel - not on the socket. The well pipe socket must be carefully and evenly cut off.

✔️ Clean the well pipe from any debris and residues to ensure proper head seating.

Manhole head dimensions:

ØD1 - 110 mm – diameter matching the outer diameter of the well pipe.

ØD2 - 99 mm – diameter of the seal designed for installation inside the pipe with diameter D1.

H - 32 mm

⚠️ IMPORTANT – Head Compatibility with Pipes

✅ Our manhole head is designed to work with blue well pipes compliant with PN-G-02323 standard, used in professional deep wells. These pipes have appropriate wall thickness and high pressure resistance – ideal for such installations.

❌ The head is not intended for installation on sewer pipes (e.g., orange, thin-walled) that do not meet technical requirements for deep wells.

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