Install Instructions
ENGLISH INSTRUCTIONS
Limited Warranty: FEBCO (the “Company”) warrants each product to be free from defects in material 
and workmanship under normal usage for a period of one year from the date of original shipment. In the 
event of such defects within the warranty period, the Company will, at its option, replace or recondition 
the product without charge. 
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY 
GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER 
WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL 
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive 
remedy for breach of warranty, and the Company shall not be responsible for any incidental, special 
or consequential damages, including without limitation, lost profits or the cost of repairing or replacing 
other property which is damaged if this product does not work properly, other costs resulting from labor 
charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water 
conditions, chemical, or any other circumstances over which the Company has no control. This warranty 
shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance 
or alteration of the product. 
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow 
the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may 
not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights 
that vary from State to State. You should consult applicable state laws to determine your rights. SO 
FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT 
BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL 
SHIPMENT.
Garantía limitada: FEBCO (en adelante, “la Compañía”) garantiza, por un período de un año a partir de la fecha 
de embarque original, que sus productos están libres de defectos en materiales y mano de obra bajo condiciones 
de uso normal. En caso de que se encuentren tales defectos dentro del período de garantía, la Compañía reem-
plazará o reacondicionará, a su elección, el producto sin costo alguno. 
LA GARANTÍA AQUÍ ESTIPULADA SE OTORGA EN FORMA EXPRESA Y ES LA ÚNICA GARANTÍA 
OTORGADA POR LA COMPAÑÍA EN RELACIÓN CON EL PRODUCTO. LA COMPAÑÍA NO OTORGA NINGUNA 
OTRA GARANTÍA, YA SEA EXPRESA O IMPLÍCITA. LA COMPAÑÍA POR LA PRESENTE RENUNCIA 
ESPECÍFICAMENTE A TODAS LAS DEMÁS GARANTÍAS, EXPRESAS O IMPLÍCITAS, INCLUYENDO SIN 
LIMITACIÓN, LAS GARANTÍAS IMPLÍCITAS DE APTITUD PARA LA COMERCIALIZACIÓN E IDONEIDAD PARA 
UN PROPÓSITO EN PARTICULAR. 
La solución descrita en el primer párrafo de esta garantía constituirá la única y exclusiva solución por incum-
plimiento de garantía, y la Compañía no se hará responsable por daños accidentales, especiales o indirectos, 
incluyendo sin limitación, la pérdida de ganancias o el costo de reparación o reemplazo de otra propiedad que 
resulte dañada por el mal funcionamiento de este producto, otros costos resultantes por mano de obra, retardos, 
vandalismo, negligencia, obstrucciones ocasionadas por materiales extraños, daños debidos a condiciones 
adversas del agua, químicos o cualquier otra circunstancia sobre la cual la Compañía no tenga control. Esta 
garantía no tendrá validez en cualquier caso de abuso, uso indebido, aplicación incorrecta, instalación inadec-
uada, o mantenimiento adecuado o alteración del producto. 
Algunos Estados no permiten limitaciones en la duración de una garantía implícita y algunos Estados no permiten 
la exclusión o limitación de daños accidentales o indirectos. Por lo tanto, es posible que las limitaciones anteriores 
no sean aplicables en su caso. Esta garantía limitada le da derechos legales específicos; usted podría tener tam-
bién otros derechos que varían según el Estado. Usted debe consultar las leyes estatales aplicables para deter-
minar sus derechos. EN LA MEDIDA EN QUE SEA CONGRUENTE CON LAS LEYES ESTATALES APLICABLES, 
CUALQUIER GARANTÍA IMPLÍCITA QUE NO SEA RECHAZADA, INCLUYENDO LAS GARANTÍAS IMPLÍCITAS DE 
APTITUD PARA LA COMERCIALIZACIÓN E IDONEIDAD PARA UN PROPÓSITO EN PARTICULAR, SE LIMITA EN 
SU DURACIÓN A UN AÑO A PARTIR DE LA FECHA DEL EMBARQUE ORIGINAL.
Garantie limitée:  FEBCO (la « Société ») garantit que chacun de ses produits est exempt de vice de 
matériau et de fabrication dans des conditions normales d’utilisation pour une période d’un an à compter 
de la date d’expédition d’origine. Dans l’éventualité où de tels vices se manifesteraient pendant la période 
de garantie, la Société, à sa discrétion, remplacera ou reconditionnera le produit sans frais. 
LA PRÉSENTE GARANTIE EST EXPRESSE ET REPRÉSENTE LA SEULE GARANTIE OFFERTE PAR 
LA SOCIÉTÉ POUR CE PRODUIT. LA SOCIÉTÉ N’OFFRE AUCUNE AUTRE GARANTIE, EXPRESSE OU 
TACITE. PAR LA PRÉSENTE, LA SOCIÉTÉ REJETTE SPÉCIFIQUEMENT TOUTE AUTRE GARANTIE, 
EXPRESSE OU TACITE, NOTAMMENT TOUTE GARANTIE TACITE DE QUALITÉ MARCHANDE OU 
D’ADAPTATION À UN BUT PARTICULIER. 
Le recours décrit dans le premier paragraphe de cette garantie constitue le seul recours à toute violation 
de la présente garantie. La Société ne saurait être tenue responsable de tout dommage accessoire, spé-
cial ou indirect, y compris, de façon non limitative : la perte de profits ou le coût afférent à la réparation ou 
au remplacement d’autres biens qui seraient endommagés par suite du fonctionnement incorrect dudit 
produit ; d’autres coûts résultant de frais de main-d’œuvre, de retards, de vandalisme, de négligence, 
d’une obstruction causée par des matériaux étrangers, de dommages causés par une eau impropre, 
des produits chimiques ou par tout autre événement échappant au contrôle de la Société. La présente 
garantie est déclarée nulle et non avenue en cas d’usage abusif ou incorrect, d’application, d’installation 
ou d’entretien incorrects ou de modification du produit. 
Certains États n’autorisent pas les limitations de durée d’une garantie tacite ou l’exclusion ou la limita-
tion des dommages accessoires ou indirects. Les limitations susmentionnées peuvent donc ne pas 
s’appliquer à vous. Cette garantie limitée vous donne des droits spécifiques et il se peut que vous ayez 
aussi d’autres droits qui varient d’un État à l’autre. Veuillez vous référer aux lois applicables de l’État pour 
déterminer vos droits en la matière. DANS LA MESURE PERMISE PAR LA LOI APPLICABLE DE L’ÉTAT, 
TOUTES LES GARANTIES TACITES NE POUVANT PAS ÊTRE REJETÉES, Y COMPRIS LES GARANTIES 
TACITES DE QUALITÉ MARCHANDE ET D’ADAPTATION À UN BUT PARTICULIER, SONT LIMITÉES 
QUANT À LEUR DURÉE À UN AN À COMPTER DE LA DATE D’EXPÉDITION D’ORIGINE.
You are required to thoroughly read all installation instructions and product safety 
information before beginning the installation of this product. FAILURE TO COMPLY 
WITH PROPER INSTALLATION AND MAINTENANCE INSTRUCTIONS COULD 
RESULT IN PRODUCT FAILURE WHICH CAN CAUSE PROPERTY DAMAGE, 
PERSONAL INJURY AND/OR DEATH. FEBCO is not responsible for damages 
resulting from improper installation and/or maintenance.
Local building or plumbing codes may require modifications to the information 
provided. You are required to consult the local building and plumbing codes prior 
to installation. If this information is not consistent with local building or plumbing 
codes, the local codes should be followed. 
Need for Periodic Inspection/Maintenance: This product must be tested periodi-
cally in compliance with local codes, but at least once per year or more as service 
conditions warrant. Corrosive water conditions, and/or unauthorized adjustments or 
repair could render the product ineffective for the service intended. Regular check-
ing and cleaning of the product’s internal components helps ensure maximum life 
and proper product function.
Installation Instructions
1.   These instructions apply to models 860 (RP), 860U (RP), LF860 (RP), and 
LF860U (RP) sizes 
1
⁄2" - 2" (15 - 50mm) only. The valves may be installed only in 
the orientation/flow direction as shown. 
2.   THE VALVE ASSEMBLY MUST BE INSTALLED WHERE RELIEF VALVE 
DISCHARGE WILL BE ACCEPTABLE, OR WHERE RELIEF DISCHARGE CAN 
BE COMPLETELY DRAINED. The valve assembly must be installed where it is 
accessible for periodic testing and maintenance. Clearances shown in the instal-
lation views apply to exterior and interior installations and are only recommenda-
tions. These minimums do not apply to removable protective enclosures. Refer 
to local codes for actual requirements in your area.
   Note: The gap drain is not designed to catch the maximum discharge possible 
from the relief valve. The installation of FEBCO air gap with the drain line termi-
nating above a floor drain will handle any normal discharge or nuisance spitting 
through the relief valve. However, floor drain size may need to be designed to 
prevent water damage caused by a catastrophic failure condition. Do not reduce 
the size of the drain line from the air gap fitting.
3.   PRIOR TO INSTALLING THE VALVE INTO THE LINE, FLUSH THE SUPPLY LINE 
OF ALL FOREIGN MATERIAL. Failure to flush the supply line may cause the 
Check Valve Disassembly cont.
6.   Inspect for debris, damage or fouling of the seat disc. Clean and/or replace parts 
as required.
7.   Reassemble the valve in the reverse order of disassembly. Ensure the orienta-
tion of the 1st check assembly is positioned so that one (#2) of the four (4) flow 
path windows faces down towards the relief valve.
Relief Valve Disassembly
1.   Close the outlet shutoff valve, then close the inlet shutoff valve. Bleed residual 
pressure from the assembly by opening the #4, #3, and # 2 test cocks in this 
sequence.
2.   Remove the relief valve cover bolts, cover and relief valve assembly in accor-
dance with the FEBCO maintenance manual.
3.   Inspect/clean seat surfaces, seals and diaphragm. Replace worn or damaged 
parts as required.
4.  Reassemble the relief valve in the reverse order of disassembly.
Test Procedures
FEBCO recommends the use of the appropriate test method presented in the ASSE 
Series 5000 manual that is consistent with your local codes.
IS-F-860RPZ 1204  EDP# 980058  © 2012 FEBCO
A Watts Water Technologies Company
IS-F-860RPZ 1204  EDP# 980058  © 2012 FEBCO
Una compañía de Watts Water Technologies
IS-F-860RPZ 1204  EDP# 980058  © 2012 FEBCO
Une entreprise de Watts Water Technologies
Typical Installation cont.
Series 860 and LF860
Series 860 y LF860
Séries 860 et LF860
 Reduce Pressure Zone Assemblies
Montajes de zona de presión reducida
Disconnecteurs à zone de pression réduite 
contrôlable
Size: 
1
⁄2" - 2" (15-50mm) 
Tamaño: 
15 a 50 mm (0,5 a 2 pulg.) 
Dimensions : 
15 à 50 mm (0,5 à 2 po)
IS-F-860RPZ
Installation Instructions • Instrucciones de instalación • Instructions d’installation
Model 860
USA: Tel: (559) 441-5300 • Fax: (559) 441-5301 • www.FEBCOonline.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.FEBCOonline.ca
EE. UU.: Tel: (559) 441-5300 • Fax: (559) 441-5301 • www.FEBCOonline.com
Canadá
: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.FEBCOonline.ca
États-Unis :
Tél 
: (559) 441-5300 • 
Téléc 
: (559) 441-5301 • www.FEBCOonline.com
Canadá 
: 
Tél 
: (905) 332-4090 • 
Téléc 
: (905) 332-7068 • www.FEBCOonline.ca
check valves to become fouled and require disassembly and cleaning.
4.   After installation SLOWLY fill the assembly with water and bleed air from the body using 
the #2, # 3 and # 4 test cocks. Test the valve assembly to ensure correct operation.
 NOTE: All assemblies are tested at the factory for proper operation and leakage. If the 
valve does not pass the field test, it is most likely due to a fouled check valve. This is not 
covered by the factory warranty. The valve cover must be removed and the check seats 
inspected and cleaned. Any damage or improper operation caused by pipeline debris or 
improper installation/start-up is not included in the factory warranty.
   In case of a possible warranty claim, contact your local supplier or FEBCO 
Representative. DO NOT REMOVE THE VALVE ASSEMBLY FROM THE PIPELINE.
5.   The assembly must be protected from freezing and excessive pressure increases. Thermal 
expansion or water hammer can cause pressure increases. These excessive pressure situ-
ations must be eliminated to protect the valve and system from possible damage. 
6.   Plastic testcock plugs and tethers are provided (loose in box) for areas that require them.
Service and Maintenance
General
1.   Detailed maintenance manuals are available from your local FEBCO representative.
2.  Rinse all parts with clean water prior to reassembly.
3.   DO NOT USE PIPE DOPE, OIL, GREASE OR SOLVENT ON ANY PARTS unless instruct-
ed to do so.
4.   Do not force parts. Parts should fit together freely. Excess force may  
cause damage and render the assembly inoperable.
5.  Carefully inspect seals and seating surfaces for debris or damage.
6.   After servicing, repressurize the assembly and test to ensure  
proper operation.
Figure 1
12" Min (300mm)
Flow
12" Min (300mm)
3" Min (75mm)
18" Min (450mm)
HORIZONTAL INSTALLATION 860, LF860, 860U & LF860U 
(Top & Side view, shown with strainer)
Figure 2
Troubleshooting
  PROBLEM    CAUSE  SOLUTION
1.  Continuous relief  a. Debris on check  Disassemble and clean
 valve discharge   seating surface     
    b. Debris on relief valve  Disassemble and clean
   seating surfaces 
2.  Intermittent relief  a. Inlet pressure fluctuations  Eliminate fluctuations
  valve discharge  b. Downstream pressure surges  Eliminate surges
Check Valve Disassembly
1.  Remove cover-bolts using the appropriate size wrench.
2.   Remove the spacer between the checks by grasping the flanged end of spacer and pull-
ing straight up.
3.   Remove the inlet check assembly by pulling it out from the body bore, in the direction of 
flow, until it is completely exposed, then lift out of body.
4.   Remove the outlet check assembly by placing the tip of a medium sized flat slotted screw 
driver in the slot of the seat and pry the check assembly back until the O-ring is exposed. 
Then, using your fingers, pull it out from the body bore until it is completely exposed. Lift 
check assembly from the body. 
5.   Both check assemblies are disassembled and reassembled in the same manner. To disas-
semble, grasp the seat section in one hand and the guide section in the other hand. 
   Rotate in a counter-clockwise direction (approximately 
1
⁄8 turn) until the two parts disen-
gage.
WARNING
!
Typical Installation


