Case Study: Orem 4-Unit Apartment — Cross-Unit Toilet Supply Failure

Property: 1988 4-unit apartment building, west Orem, Utah County
Building Configuration: Two-story, 2 units per floor (upper units A and B, lower units C and D)
Affected Units: Unit B (source, upper), Unit D (cascading damage, lower), plus building common corridor and utility spaces
Loss Date: May 3, 2024 — 11:47 AM (Unit B tenant home; discovered immediately)
Loss Category: IICRC S500 Category 1 (clean water)
Loss Class: Class 3 (multi-unit affected area, cross-floor cascade)
Response Time: 38 minutes from dispatch to on-site arrival (Orem daytime typical)
Total Restoration Timeline: 26 days across both affected units and common areas
Insurance Carriers: Landlord policy (Farmers commercial residential property), Unit B tenant renters policy (State Farm), Unit D tenant renters policy (no policy — uninsured tenant)
Aggregate Xactimate Scope: $76,120 across all affected areas

The Loss Event

The Unit B (upper east) toilet supply fill valve failed in the open position at approximately 11:30 AM on May 3, 2024. The tenant was home and heard the toilet’s continuous fill cycle within 15 minutes but assumed it was a minor issue. When she went to investigate at 11:47 AM, she found the toilet tank overflowing at the top, water pouring down the outside of the tank and pooling around the toilet base. She attempted to close the supply valve at the toilet’s shutoff, but the shutoff was corroded and would not turn. Water continued flowing until she was able to close the main water shutoff for Unit B at the utility closet.

Estimated flow duration: approximately 22 minutes at 3 GPM (toilet fill valve full flow), producing approximately 65 gallons of water release. The Unit B bathroom floor and hallway floor absorbed some water; the remainder migrated across the bathroom floor, through the bathroom wall assembly, and down into the ceiling and wall assemblies of Unit D directly below.

The Unit B tenant called our emergency line at 11:52 AM. She also alerted the building manager, who then contacted the Unit D tenant to inspect potential damage below.

The property is a 1988 4-unit apartment building of typical multifamily construction: wood-frame platform construction with fire blocking between floors, copper supply lines with PEX repairs and modifications over the decades, ABS drain lines throughout, standard drywall assemblies, carpet in all living areas, vinyl in kitchen and bathroom areas.

Diagnostic Sequence

Arrival at 12:25 PM (38 minutes after dispatch). Assessment of both affected units:

Unit B (upper — source):

Bathroom vinyl floor

Standing water eliminated by tenant’s initial mop cleanup, but subfloor beneath at 22-28% MC via extension probe through grout line

Hallway carpet

Saturated across approximately 45 sq ft where water had migrated from bathroom

Bathroom wall assemblies

Bottom 8 inches of drywall wet on three walls; framing behind at 18-24% MC across approximately 24 linear feet

Bathroom vanity cabinet

Cabinet base at 20% MC; toe kick wet

Unit D (lower — cascading damage):

Bathroom ceiling (directly below Unit B bathroom)

Drywall ceiling saturated across approximately 40 sq ft with active dripping into the bathroom below

Bathroom walls

Upper wall assemblies wet from water tracking down cavity from ceiling; approximately 20 linear feet of wall base wet

Bathroom vinyl floor

Wet from dripping water; subfloor at 18-24% MC

Living room ceiling (partial affected area from ceiling cavity migration)

Approximately 25 sq ft of ceiling drywall wet at the corner nearest the bathroom

Building common corridor:

Utility closet floor and walls

Minor water intrusion from main shutoff operations; approximately 15 sq ft affected

Multi-Party Coordination Framework

Multi-unit residential losses in rental configurations require coordination across landlord and tenant insurance policies. The scope boundaries:

Landlord policy (Farmers commercial residential property)

Building structure — all drywall, framing, subflooring, ceiling assemblies, permanent fixtures (bathroom vanity, toilet replacement). Also covers common areas and building envelope.

Unit B tenant (State Farm renters policy)

Tenant’s personal property affected in Unit B — some hallway rug items, a few personal belongings that got wet. Modest scope.

Unit D tenant (no policy — uninsured)

Tenant’s personal property affected in Unit D — bathroom towels, some ceiling-adjacent items. Uninsured tenant is responsible for their own contents; landlord policy does not cover tenant personal property. This became a difficult conversation.

The landlord (who owned the building) coordinated with us as the primary point of contact. Individual tenant policies filed their claims independently for personal property scopes. The Unit D uninsured tenant faced modest out-of-pocket loss for personal property (estimated $400 to $600 in bathroom items) — a common outcome of tenant uninsurance that emphasizes the importance of renters policies (typically $15 to $25 per month for basic coverage).

Equipment Deployment

Extraction (initial cleanup)

Wet-vacuum extraction of Unit B hallway carpet and Unit D bathroom over 2 hours.

Phoenix R150 LGR dehumidifiers (2 units)

One in Unit B (bathroom + hallway), one in Unit D (bathroom + living room corner).

Phoenix Focus air movers (4 units per unit, 8 total)

Distributed across affected areas in both units.

Novatek NA-1500 HEPA scrubber

Deployed in Unit D for particulate management during ceiling drywall demolition.

Containment for demolition zones

6-mil poly containment established in Unit D bathroom and living room area during ceiling and wall drywall work to isolate work zones from tenant living areas.

Drying and Reconstruction Timeline

Extraction and drying phase: 8 days across both units. Reconstruction phase: 18 additional days.

Unit B scope

Bathroom vanity cabinet drying (retained after moisture verification). Bathroom subfloor drying. Hallway carpet cleaning and drying (retained). Bathroom wall base drywall replacement (24 linear feet, bottom 8 inches). Bathroom repaint. Toilet fill valve and supply-line assembly replacement by plumbing contractor.

Unit D scope

Bathroom ceiling drywall replacement (40 sq ft). Bathroom wall drywall replacement (20 linear feet). Living room ceiling drywall repair (25 sq ft corner section). Vinyl flooring inspection — retained after subfloor drying verification. Complete bathroom repaint and living room corner ceiling paint match.

Common area scope

Utility closet drywall and paint repair.

Building system coordination

Plumbing contractor replaced Unit B toilet fill valve, supply-line, and corroded shutoff valve. Verified operational for future maintenance access.

Insurance Coordination Documentation

Documentation submitted to primary landlord carrier (Farmers commercial residential):

• Photo series specific to each unit and common areas (aggregate 187 photos)
• Individual Xactimate scopes per unit and per common area
• Failed fill valve documentation and failed shutoff valve retention
• Coordination summary documenting building policy scope vs. individual tenant policy scopes
• Plumbing contractor scope for source repair (separate from restoration, but referenced for chronology)

Documentation submitted to State Farm (Unit B tenant renters policy):

• Unit B tenant personal property inventory with pre-loss valuations
• Photo documentation of specific tenant property affected

Total covered restoration: $76,120 across landlord and tenant policies. Uninsured Unit D tenant absorbed modest personal property loss.

Outcome

Full restoration completed 26 days after initial loss response. Both units returned to normal habitability. Building tenant relationships preserved through coordinated communication and minimal displacement (Unit D tenant was displaced 6 nights during active bathroom demolition; landlord provided hotel accommodation as part of building policy scope). Unit B tenant remained in unit throughout restoration with minimal disruption.

Post-restoration follow-up: building manager elected to conduct proactive assessment of all toilet fill valves and shutoff valves across the 4-unit building. Two additional units showed corroded shutoff valves that were replaced preventively. This kind of pattern — where one unit’s failure indicates likely failures in similar building systems — is common in multifamily properties.

Key Learnings

• Cross-unit water damage in multifamily construction is a routine restoration configuration but requires careful policy scope coordination. Landlord policy handles building structure; individual tenant policies handle personal property; uninsured tenants face out-of-pocket loss. Building manager involvement in initial scope discussion is worth the coordination time.
• Renters insurance ($15 to $25 monthly for basic coverage) protects tenant personal property in exactly this type of unforeseeable loss. Uninsured tenants absorb losses that landlord policies cannot cover. Building managers can encourage tenant insurance during lease signing without requiring it.
• Corroded shutoff valves are a common finding in older multifamily buildings. When one unit’s failure reveals a corroded shutoff, similar failures across other units in the same building are likely. Proactive building-wide assessment is worth the coordination.
• Toilet fill valve failure is a recurring failure mode across all residential and multifamily construction. Preventive fill valve replacement every 5 to 7 years costs $15 to $30 per toilet and prevents this specific failure mode. Building managers can integrate this into preventive maintenance schedules.
• Multi-unit displacement coordination requires clear communication with tenants about timeline, scope, and accommodation arrangements. Written communication documenting scheduled work windows and displacement periods prevents tenant confusion and supports building manager-tenant relationships.

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