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Custom Rotomolding Steel Mould for HDPE Septic Tank & Wastewater Treatment Tank

Brand Name:	SunMore
Model Number:	SM-STM
MOQ:	1 Piece
Price:	Advisory Service
Delivery Time:	45 working days
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

China Jiangsu

Certification:

CE/ISO9001

Brand:

SUNMORE

Material:

High Quality Thick Carbon Steel

Process:

CNC Cutting + Full Welding + Anti-Rust Treatment

Type:

Rotomoulding Steel Mold For HDPE Septic Tank & Wastewater Treatment Tank

Custom Service:

OEM & ODM Available

Usage:

For HDPE Septic Tank, Domestic Wastewater & Sewage Treatment

Feature:

High Structural Strength & Corrosion Resistance

Application:

Rural Sewage Treatment, Residential Drainage & Public Facilities

Packaging Details:

Wooden box

Supply Ability:

Can produce 8-10 molds per month

Highlight:

custom rotomolding steel mould

HDPE septic tank mould

wastewater treatment tank mould

Product Description

Custom Rotomolding Steel Mould for HDPE Septic Tank & Wastewater Treatment Tank

OEM ODM Rotomoulding Steel Mold for HDPE Septic Tank & Wastewater Treatment Tank is a heavy-duty rotational mould independently designed and manufactured by SUNMORE factory. It is specially used for one-piece rotomolding of HDPE corrugated septic tanks, domestic wastewater treatment tanks and underground sewage holding vessels.

Product Overview

Made of high-quality thick carbon steel, this mould features excellent structural strength, good heat resistance and long service life. It is suitable for mass production of various specifications of septic tanks, meeting the diverse needs of rural domestic sewage treatment, residential drainage systems, public facilities and decentralized wastewater management projects.

Problems We Solved

Poor structural strength leading to mould deformation

Conventional steel moulds often deform after repeated high-temperature cycles, resulting in dimensional errors of the finished septic tank. Our high-grade thick carbon steel mould with reinforced rib design ensures structural stability and no deformation even after long-term continuous production.

Uneven heat distribution causing inconsistent wall thickness

Ordinary moulds may have uneven heating during the rotomoulding process, leading to weak points and pressure resistance issues in the tank. Our optimized internal flow design ensures uniform heat distribution, making the tank wall thickness consistent and corrosion-resistant.

Complex corrugated structure leading to difficult demoulding

Traditional mould designs for corrugated septic tanks can make demoulding slow and damage the product. Our optimized split-type structure with heavy-duty quick-release clamps allows for fast assembly, disassembly and demoulding, significantly improving production efficiency.

Low wear resistance leading to short service life

Common steel moulds wear out quickly in high-volume production, especially on corrugated and threaded areas, requiring frequent maintenance. Our mould undergoes professional anti-rust, anti-corrosion and anti-wear treatment, reducing maintenance frequency and extending service life to tens of thousands of cycles.

Specifications

Material	High-Quality Thick Carbon Steel
Processing Technology	CNC Cutting + Full Welding + Reinforced Ribs + Anti-Rust & Anti-Wear Treatment
Customization	Supports OEM/ODM customization of tank capacity, shape, corrugated structure, connection ports and manhole positions according to customer drawings or samples
Structure	Split mould with reinforced frame, quick-lock clamps and standard rotomoulding equipment interface

Applications

Used for rotomolding production of HDPE septic tanks, domestic wastewater treatment tanks, underground sewage holding vessels and decentralized sewage containers. Widely applicable to rural sewage treatment, residential drainage systems, public toilets, hotels, schools, construction sites and other decentralized wastewater management scenarios.

Selection Guide

Choose this mould when:

You need mass production of high-quality HDPE septic tanks and wastewater treatment tanks
You require a mould with high structural strength and long service life for continuous production
Your products are for underground installation and demand high pressure resistance, corrosion resistance and leak-proof performance

Choose other options when:

Small-batch trial production or special-shaped tank designs (custom mould solutions available for cost optimization)
Ultra-large capacity septic tanks (custom heavy-duty mould solutions available upon request)

Frequently Asked Questions

Can you customize septic tank moulds with different capacities and structures?

Yes, we provide full OEM/ODM customization services, supporting moulds for septic tanks from 500L to 5000L in various structures (single-chamber, double-chamber, triple-chamber) according to your requirements.

What are the advantages of steel mould for septic tank production?

Steel mould has high structural strength, excellent pressure resistance and cost-effectiveness, making it ideal for mass production of large-volume underground septic tanks. It maintains stable performance under long-term high-temperature use and has a longer service life.

Can the mould produce septic tanks with different connection ports or manholes?

Yes, we can design the mould according to your requirements, including reserved ports for inlets, outlets, vents, manholes and other accessories.

What is the service life of this steel mould?

With proper maintenance, the mould can support tens of thousands of rotomoulding cycles, ensuring long-term stable production of high-quality septic tanks.

Ratings & Review

Overall Rating

5.0

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

All Reviews

Zoe Clark

Benin May 28.2026

trustpilot.com

Helpful (13)

High temperature and strong ultraviolet weather locally can’t affect the tank performance. These 15 ton roto tanks serve urban residential area water reserve for infrastructure project, stable continuous water supply all year round.

Tom Wilson

United Kingdom Apr 15.2026

trustpilot.com

Helpful (52)

This custom rotomolding steel mold works perfectly. The inner floral pattern is clear and delicate, and the HDPE water tanks produced have even wall thickness without any flaws. Highly recommend it!

George Adams

United Kingdom Mar 2.2026

trustpilot.com

Helpful (56)

This 7000L water tank steel mould is built to last. The structure is sturdy, and the HDPE water tanks we made have uniform wall thickness with no quality issues.

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Rotomolding Machine

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products details

Custom Rotomolding Steel Mould for HDPE Septic Tank & Wastewater Treatment Tank

custom rotomolding steel mould

HDPE septic tank mould

wastewater treatment tank mould

Overall Rating

Rating Snapshot

All Reviews

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