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VEEDER-ROOT SHALL NOT BE LIABLE FOR ERRORS CONTAINED HEREIN OR 
FOR ANY TYPE OF DAMAGES IN CONNECTION WITH THE FURNISHING, 
PERFORMANCE, OR USE OF THIS PUBLICATION.

• Veeder-Root makes no representation or warranty about the information in this publication. A 

qualified professional is required for service of the components addressed in this publication. 

• The information in this publication cannot be used as a substitution for the knowledge and 

experience of a qualified professional.

• The information contained in this publication is merely for the consideration of a qualified 

professional, which should make their own determination of how to address any issues based 
on the situation.

 

Veeder-Root reserves the right to change system options or features, or the information 

contained in this publication, at any time without notice.

• This publication contains proprietary information which is protected by copyright. All rights 

reserved. No part of this publication may be photocopied, reproduced, or translated to another 
language without the prior written consent of Veeder-Root.

• Contact TLS Systems Technical Support for additional troubleshooting information at 800-

323-1799.

CONTRACTOR CERTIFICATION REQUIREMENTS

Veeder-Root requires the following minimum training certifications for contractors who will install 
and setup the equipment discussed in this manual:

Service Technician Certification (Previously known as Level 2/3):

 Contractors holding 

valid Technician Certifications are approved to perform installation checkout, startup, 
programming and operations training, system tests, troubleshooting and servicing for all Veeder-
Root Series Tank Monitoring Systems, including Line Leak Detection.

TLS-4xx Technician Certification:

 Contractors holding valid TLS-450 Technician Certifications 

are approved to perform installation checkout, startup, programming and operations training, 
troubleshooting and servicing for all Veeder-Root TLS-450 Series Tank Monitoring Systems, 
including Line Leak Detection and associated accessories.

Warranty Registrations

 may only be submitted by selected Distributors.

SAFETY WARNINGS AND PRECAUTIONS

FAILURE TO COMPLY WITH THE FOLLOWING WARNINGS AND SAFETY 
PRECAUTIONS COULD RESULT IN SERIOUS INJURY OR DEATH, AND/OR CAUSE 
DAMAGE TO PROPERTY, AND THE ENVIRONMENT.

T

HIS SYSTEM OPERATES NEAR HIGHLY COMBUSTIBLE FUEL STORAGE TANKS.

EXPLOSIVE: 

Fuels and their vapors are extremely explosive if ignited.

FLAMMABLE:

 Fuels and their vapors are extremely flammable.

READ ALL RELATED MANUALS:

 Knowledge of all related procedures before you begin work 

is important. Read and understand all manuals thoroughly. If you do not understand a procedure, 
ask someone who does.

USE SAFETY BARRICADES:

 

Unauthorized people or vehicles in the work area are dangerous. 

Always use safety cones or barricades, safety tape, and your vehicle to block the work area

.

APPROVED CONTAINER: 

Use a non-breakable, clearly marked container, suitable for collect-

ing and transporting hazardous fuels during service.

NOTICE

NOTICE is used to address practices not related to physical injury.

USE SAFETY BARRICADES: 

Unauthorized people or vehicles in the work area are 

dangerous. Always use safety cones or barricades, safety tape and your vehicle to block the 
work area.

EPOXY SEALANT:

 is irritating to eyes, respiratory system, and skin. Can cause allergic skin 

reaction. Contains: epoxy resin and Cycloaliphatic epoxycarboxylate. 

Precautions:

 Wear 

suitable protective clothing, gloves, eye, and face protection. Use only in well ventilated areas. 
Wash thoroughly before eating, drinking, or smoking. 

GENERAL PRECAUTIONS

1.

Read and follow all instructions in this manual, including all safety procedures, local and 
federal guidelines.

2.

Have equipment installed in compliance with all applicable codes including: National 
Electrical Codes 70 and 30A; federal, state, and local codes; and other applicable safety 
codes.

3.

Substitution of components may impair intrinsic safety.

4.

Do not modify or use service parts other than those provided by Veeder-Root.

Reference Documents: 

Manual 577014-466, 577014-446

Suggested Equipment:

 V-R kit# 330020-872, approved 5-gallon container to receive diesel 

fuel; siphon pump; petroleum jelly; UL classified for petroleum, non-setting thread sealant; wire 
strippers; an adjustable wrench capable of opening to 2.275” to remove sensor; a 1/2” drive 
ratchet and extension.

PROCEDURE

1.

Turn off power to the TLS-450PLUS console and Fuel Conditioning Controller and all 
related circuits to the sump.

2.

Close the STP Adapter ball valve to isolate the Fuel Conditioner unit from the pump (see 
Figure 1). 

3.

Using a 1/2” drive ratchet and extension remove either of the two filter cap nuts. 

4.

Remove filter and set aside. Using the siphon pump and approved container, pump out 
the fluid in filter compartment until the fuel level is below the filter cavity.

Figure 1.   

1

2

Replacement Instructions

HydrX

 Fuel Conditioner Pressure Sensor

Notice and Disclaimer

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