The Wacker Neuson Sight Gauge is a genuine OEM component designed for the HSH350, HSH380, E1100, and E1250 series hydronic surface heaters. As a direct OEM replacement, this sight gauge is manufactured to the same specifications as the original part, ensuring accurate fluid-level visibility and a straightforward, like-for-like installation. It is compatible across multiple configurations within these heater families, including LP/NG, diesel, standard, basic, and premium variants. Keep this part on hand to support routine inspection and maintenance of your hydronic heating system.
Key Features
- Genuine OEM Fluid-Level Accuracy — Manufactured to the original specification, this sight gauge delivers the same clear, true fluid-level readings as the factory-installed unit — critical for managing antifreeze/glycol levels in a closed-loop heating system.
- Direct Drop-In Replacement — Matches the original mounting points and connection fittings on supported heater models, allowing straightforward removal and reinstallation without modification.
- Broad HSH and E-Series Compatibility — Fits HSH350, HSH380B, HSH380S, E1100, E1250B, E1250S, and E1250P hydronic surface heaters across LP/NG and diesel fuel configurations, with and without onboard generators.
- System Integrity at a Glance — A properly functioning sight gauge lets operators confirm correct fluid levels before and during operation, helping prevent dry-running conditions that can damage pump components and heat exchangers.
- Fluid System Safety — Maintaining an accurate sight gauge is essential for verifying that the closed-loop fluid circuit is correctly charged — an unchecked low-fluid condition in a pressurized hydronic system can lead to overheating and system damage.
A sight gauge provides a direct visual window into the fluid reservoir or closed-loop circuit of a hydronic surface heater, allowing operators to confirm that the system contains the correct volume of heat-transfer fluid — typically a glycol-and-water mixture. Without a functioning sight gauge, it is impossible to visually verify fluid levels without opening the system, which risks introducing air, losing pressure, or contaminating the circuit. When the gauge cracks, becomes discolored, or begins to leak, it should be replaced promptly to maintain safe and accurate system monitoring.
Part Details
| Part Number | 5000168831 |
|---|---|
| Old Part Number | 0168831 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Sight Gauge |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Hydronic Surface Heater | HSH350 | 5000620254, 5200001677 |
| E1250S | E1250S | 5200012355, 5200012354 |
| E1100 GROUND HEATER | E1100 | 5000620172, 5000620244, 5200001676 |
| E12540B | E1250B | 5200012353, 5200007613 |
| HSH380s | HSH 380S | 5100054643 |
| E 1250P Hydronic Heater, Premium, Diesel | E1250P | 5200012357, 5200012356 |
| HSH380S-Diesel, with Generator | HSH380S | 5200012371, 5200012370 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359, 5200007614 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
